method_cref      2679 proc.c         	    envval = env_clone(envval, method_receiver(method), method_cref(method));
method_cref       241 vm_method.c    		rb_cref_t *method_cref, *cref = iseq_body->cref;
method_cref       249 vm_method.c    		    method_cref = cref;
method_cref       252 vm_method.c    		    method_cref = vm_cref_new_toplevel(GET_THREAD()); /* TODO: can we reuse? */
method_cref       255 vm_method.c    		RB_OBJ_WRITE(me, &def->body.iseq.cref, method_cref);