is_dynamic_template_index method Null safety

Implementation

bool is_dynamic_template_index() {
  final constructor =
  _dll_handle.lookupFunction<_Context_isDynamicTemplateIndex_c, _Context_isDynamicTemplateIndex_dart>(_context_namespace + 'isDynamicTemplateIndex');
  final exception = _getException();
  bool res = constructor(this._impl, exception);

  tdvCheckException(exception, _dll_handle);

  return res;
}