dispose method

Implementation

void dispose() {
  if(_didDispose) return;
  _didDispose = true;
  for(final key in wireframeAttributes.keys){
    (wireframeAttributes[key] as BufferAttribute).dispose();
  }

  wireframeAttributes.clear();
  geometries.clear();
  attributes.dispose();
  info.dispose();
  bindingStates.dispose();
}