Women of childbearing potential and sexually active males must be strongly advised to use an accepted and effective method of contraception or to abstain from sexual intercourse for the duration of their participation in the study Women of childbearing potential and sexually active males must be strongly advised to practice abstinence or use an accepted and effective method of contraception ELIGIBILITY CRITERIA FOR RANDOMIZATION (STEP 1): Women of childbearing potential and sexually active males must be strongly advised to use an accepted and effective method of contraception or to abstain from sexual intercourse for the duration of their participation in the study Women of childbearing potential and sexually active males must be strongly advised to use an accepted and effective method of contraception or to abstain from sexual intercourse during the treatment period and for 31 weeks after the last nivolumab infusion Sexually active males and pre/perimenopausal women must agree to use an accepted and effective method of contraception or to abstain from sexual intercourse for the duration of their participation in the study and for 3 months after discontinuation of therapy Women of child-bearing potential and sexually active males must agree to use at least two other accepted and effective methods of contraception and/or to abstain from sexual intercourse for the duration of their participation in the study, and for at least 4 weeks after treatment with dabrafenib or for 4 months after dabrafenib in combination with trametinib; women of child-bearing potential must use at least two other accepted and effective methods of contraception and/or to abstain from sexual intercourse for at least 5 months after the last dose of nivolumab and/or ipilimumab and sexually active males must use at least two other accepted and effective methods of contraception and/or abstain from sexual intercourse for at least 7 months after the last dose of nivolumab and/or ipilimumab; should a woman become pregnant or suspect she is pregnant while she is participating in this study, she should inform her treating physician immediately Women of childbearing potential (WOCBP) and males who are sexually active with WOCBP must use an accepted and effective method of contraception or abstain from sexual intercourse for at least one week prior to the start of treatment, and continue for 5 months after the last dose of protocol treatment for women of childbearing potential and 7 months after the last dose of protocol treatment for males who are sexually active with WOCBP Women of childbearing potential and sexually active males must be strongly advised to use an accepted and effective method of contraception or to abstain from sexual intercourse for the duration of their participation in the study Women of childbearing potential (WOCBP) and males who are sexually active with WOCBP must use an accepted and effective method of contraception or abstain from sexual intercourse for at least one week prior to the start of treatment, and continue for 5 months after the last dose of protocol treatment for women of childbearing potential and 7 months after the last dose of protocol treatment for males who are sexually active with WOCBP Women of childbearing potential and sexually active males must be strongly advised to use an accepted and effective method of contraception or to abstain from sexual intercourse for the duration of their participation in the study and until 60 days from the last study treatment Sexually active males must use an accepted and effective method of double barrier contraception or abstain from sexual intercourse for the duration of their participation in the study and for 26 weeks after the last dose of study drug Women of childbearing potential (WOCBP) and sexually active males must use an accepted and effective method of contraception while receiving protocol treatment or abstain from sexual intercourse for the duration of their participation in the study; WOCBP must use birth control for two weeks prior to the start of the treatment and continue for 6 weeks after the last dose of the study drug; sexually active male patients must use effective contraception from day 1 of treatment and continue for 4 months after the last dose of the study drug Women of childbearing potential and sexually active males must be strongly advised to use an accepted and effective method of contraception or to abstain from sexual intercourse for the duration of their participation in the study and for 12 months post rituximab treatment Women of childbearing potential and sexually active males must be strongly advised to use accepted and effective methods of contraception, as described in the informed consent form (ICF), or to abstain from sexual intercourse for the duration of their participation in the study; women of childbearing potential should use adequate methods to avoid pregnancy for 23 weeks after the last dose of nivolumab; sexually active males should use adequate methods to avoid pregnancy for 31 weeks after the last dose of nivolumab In sexually active patients (women of childbearing potential and males), willingness to use 2 effective methods of contraception, of which 1 must be a physical barrier method (condom, diaphragm, or cervical/vault cap) until 6 months after the last dose of FPA144. Other effective forms of contraception include: Patients must not be pregnant or breastfeeding; sexually active patients are strongly advised to use accepted, effective forms of contraception Sexually active patients of childbearing potential must agree to use effective contraception Sexually active females of childbearing potential and sexually active males with partners of reproductive potential: unwilling or unable to use appropriate contraception from screening until at least 6 months after last administration of study treatment. Sexually active patients and their partners agree to use an accepted method of contraception during the course of the study (Appendix C:Guidelines Regarding Women of Childbearing Potential). Sexually active patients of childbearing potential must be willing to use effective contraception during therapy and for at least 1 month after treatment is completed Sexually active males unwilling to practice contraception during the study and 6 months beyond Women of childbearing potential and sexually active males must use an effective contraception method during treatment and for three months after completing treatment Patients must not be pregnant or lactating as chemotherapy is thought to present substantial risk to the fetus/infant; women of childbearing potential and sexually active males must use an effective contraception method during treatment and for three months after completing treatment and negative serum or urine ?-hCG\r\npregnancy test at screening for patients of childbearing potential Women of childbearing potential and sexually active males must commit to the use of effective contraception while on study Women of child-bearing potential must use at least two accepted and effective methods of contraception and/or to abstain from sexual intercourse for at least 4 months (120 days) after the last dose of nivolumab and/or ipilimumab; sexually active males must also use at least two accepted and effective methods of contraception and/or to abstain from sexual intercourse for at least 4 months (120 days) after the last dose of nivolumab and/or ipilimumab Women of child bearing potential and sexually active males must use an accepted and effective non-hormonal method of contraception PART 2 GROUP 1 INCLUSION CRITERIA: Males and females who are sexually active must agree to use effective contraception during and for three months after treatment PART 2 GROUP 2A INCLUSION CRITERIA: Males and females who are sexually active must agree to use effective contraception during and for three months after treatment PART 2 GROUP 3 INCLUSION CRITERIA: Males and females who are sexually active must agree to use effective contraception during and for three months after treatment Women of childbearing potential and sexually active males must use an effective contraception method during treatment and for three months after completing treatment Women of childbearing potential and sexually active males must use an effective contraception method during treatment and for three months after completing treatment Sexually active patients of childbearing potential must agree to use effective contraception Agreement by females of childbearing potential and sexually active males to use an effective method of contraception while participating in this study; women of childbearing potential must have a negative pregnancy test < 2 weeks prior to registration Women of childbearing potential and sexually active males must use an effective contraception method during treatment and for three months after completing treatment Sexually active males and females of childbearing potential must agree to use a form of contraception considered effective and medically acceptable by the investigator Sexually active females of childbearing potential and sexually active males with partners of reproductive potential: unwilling or unable to use appropriate contraception from screening until at least 6 months after last administration of study treatment. Women of childbearing potential and sexually active males should use effective contraception while on study Women of childbearing potential and sexually active males should use effective contraception while on study Pregnant women may not participate; women of childbearing potential and sexually active males will be advised to effective contraception while on study Pregnant women may not participate; women of childbearing potential and sexually active males will be advised to use effective contraception while on study Women of childbearing potential and sexually active males must commit to the use of adequate contraception from the study start to one year after the last dose of study treatment REGISTRATION TO TREATMENT (STEP 1): Women of childbearing potential and sexually active males must use an accepted and effective method of contraception or to abstain from sex from time of registration, while on study treatment, and continue for 120 days after the last dose of study treatment REGISTRATION TO TREATMENT (STEP 2): Women of childbearing potential and sexually active males must use an accepted and effective method of contraception or to abstain from sex from time of registration, while on study treatment, and continue for 120 days after the last dose of study treatment ENROLLMENT: Sexually active males and females of childbearing potential must agree to use a form of contraception considered effective and medically acceptable by the investigator. (Non-childbearing potential defined as pre-menarche, greater than one year post-menopausal or surgically sterilized). Sexually active males must be strongly advised to use an accepted and effective method of contraception Women of childbearing potential and sexually active males must be strongly advised to use an accepted and effective method of contraception or to abstain from sexual intercourse for at least one week prior to the start of the research study, and continuing for 5 months for women of childbearing potential and 7 months for sexually active males after the last dose of the study drugs Women of childbearing potential and sexually active males must use an accepted and\n effective method of contraception throughout the study and for 8 weeks after\n completion of the study. Women of childbearing potential and sexually active males must be strongly advised to use an accepted and effective method of contraception PHASE II: Women of childbearing potential and sexually active males must be strongly advised to use an accepted and effective method of contraception Sexually active patients of childbearing potential must agree to use an effective method of contraception during the study and for at least 6 months after the completion of bevacizumab therapy Women of childbearing potential and sexually active males must use contraception while on study Subjects who are women of childbearing potential and sexually active males must be willing to use effective contraception while on study Women of childbearing potential and sexually active males must use an accepted and effective method of contraception or agree to abstain from sexual intercourse during their participation in the study and for 3 months following completion of their participation Females of childbearing potential and nonsterilized males who are sexually active must use effective methods of contraception Women of childbearing potential and sexually active males must agree to practice abstinence or use an accepted and effective method of contraception Males (if sexually active with a FCBP) must Women of childbearing potential and sexually active males must use an accepted and effective method of contraception or to abstain from sexual intercourse for the duration of their participation in the study Women of childbearing potential and sexually active males must use an effective contraception method during treatment and for three months after completing treatment Women of childbearing potential and sexually active males are strongly advised to use appropriate contraceptive measures Women of childbearing potential and sexually active males must be strongly advised to use an accepted and effective method of contraception Sexually active patients of childbearing potential must agree to use effective contraception Women of childbearing potential and sexually active males must be strongly advised to use an accepted and effective method of contraception or to abstain from sexual intercourse for 90 days after the last dose of study drug Women of childbearing potential and sexually active males are strongly advised to use an accepted and effective method of contraception Females of childbearing potential and sexually active males must agree to use an accepted and effective method of contraception while on study Women of childbearing potential and sexually active males must be strongly advised to use an accepted and effective method of contraception Women of childbearing potential and sexually active males must be strongly advised to use an accepted and effective method of non-hormonal contraception; acceptable contraception includes barrier methods (e.g., condoms or diaphragm) or intrauterine devices or IUDs (these may include low-dose hormones at the discretion of the Study Chair) Women of childbearing potential and sexually active males are strongly advised to use an accepted and effective method of contraception Women of childbearing potential and sexually active males must be strongly advised to use an accepted method of contraception Women of childbearing potential and sexually mature males must agree to use a medically accepted method of contraception throughout the study and for 30 days following the last dose; Patients of childbearing potential who are sexually active and unwilling to use a highly effective method of contraception Women of childbearing potential and sexually active males must use an effective contraception method during treatment and for three months after completing treatment Sexually active females of childbearing potential and sexually active males with partners of reproductive potential: unwilling or unable to use appropriate contraception from screening until at least 30 days after last administration of study treatment Women of childbearing potential and sexually active males must use an effective contraception method during treatment and for three months after completing treatment Women of childbearing potential and sexually active males must use an effective contraception method during treatment and for three months after completing treatment Women of childbearing potential must be strongly advised to use an accepted and effective method of contraception or to abstain from sexual intercourse for the following year until the year 1 AB-MR and DBT studies are performed Women of childbearing potential and sexually active males must use an accepted and effective method of contraception or to abstain from sexual intercourse for the duration of their participation in the study Women of childbearing potential and sexually active males are strongly advised to use an accepted and effective method of contraception Women of childbearing potential must be strongly advised to use an accepted and effective method of contraception or to abstain from sexual intercourse for the duration of their participation in the study Sexually active patients of childbearing potential must agree to use an effective method of contraception during the study and for at least 6 months after the completion of bevacizumab therapy Women of childbearing potential and sexually active males must be strongly advised to use an accepted and effective method of contraception or to abstain from sexual intercourse for the duration of their participation in the study