NODE_OPTBLOCK    4829 compile.c            case NODE_OPTBLOCK:{
NODE_OPTBLOCK    1416 gc.c           	  case NODE_OPTBLOCK:
NODE_OPTBLOCK     237 node.h             NODE_OPTBLOCK,
NODE_OPTBLOCK     238 node.h         #define NODE_OPTBLOCK    NODE_OPTBLOCK
NODE_OPTBLOCK     460 node.h         #define NEW_OPTBLOCK(a) NEW_NODE(NODE_OPTBLOCK,a,0,0)