CREF_REFINEMENTS_SET 1102 eval.c         	CREF_REFINEMENTS_SET(cref, hidden_identity_hash_new());
CREF_REFINEMENTS_SET 1106 eval.c         	    CREF_REFINEMENTS_SET(cref, rb_hash_dup(CREF_REFINEMENTS(cref)));
CREF_REFINEMENTS_SET  148 vm.c           	CREF_REFINEMENTS_SET(new_cref, rb_hash_dup(CREF_REFINEMENTS(cref)));
CREF_REFINEMENTS_SET 1625 vm_eval.c          CREF_REFINEMENTS_SET(cref, refinements);