free method
void
free()
Implementation
void free() {
detach();
if (_ref != nullptr) {
JS_FreeContext(_ref);
}
if (_buf != null && _buf != nullptr) {
calloc.free(_buf!);
}
_setWorkerNewContextFuncNC?.close();
_cfuncDataNC?.close();
_cfuncNC?.close();
_jobFuncNC?.close();
}