return MathMLDummyElement::create(this->getMathMLNamespaceContext());
SmartPtr<MathMLElement> elem = MathMLDummyElement::create(this->getMathMLNamespaceContext()); elem->resetDirtyStructure(); elem->resetDirtyAttribute(); return elem;
  createMathMLDummyElement(void) const  {    return MathMLDummyElement::create(this->getMathMLNamespaceContext());  }