CFunctionId       556 src/assembler.h   ExternalReference(Builtins::CFunctionId id, Isolate* isolate);
CFunctionId       322 src/builtins.h   static Address c_function_address(CFunctionId id) {
CFunctionId       348 src/builtins.h                                CFunctionId id,
CFunctionId        84 src/serialize.cc       ExternalReference ref(static_cast<Builtins::CFunctionId>(id), isolate);