dynamic noSuchMethod(Invocation invocation)

Invoked when a non-existent method or property is accessed.

Classes can override noSuchMethod to provide custom behavior.

If a value is returned, it becomes the result of the original invocation.

The default behavior is to throw a NoSuchMethodError.

Source 

noSuchMethod(Invocation invocation) {
  if (invocation.isMethod && invocation.memberName == #call) {
    return _apply(_buildArgs(invocation));
  }
  return super.noSuchMethod(invocation);
}