RecruitingProcedureA Randomized Phase II Basket Trial EXTENDing Efficacy of Systemic Therapy With Local Consolidative Therapy for OligoProgressive Metastatic Disease (EXTEND-OP)To find out if local consolidation therapy (such as radiation therapy with or without other local therapies such as surgery, ablation \[the removal or destruction of a body part or tissue or its function\], or embolization \[a procedure that uses particles, such as tiny gelatin sponges or beads, to block a blood vessel\]) to all progressive sites of disease can help to control the disease compared with next-line systemic therapy.