void QgsMapLayerStyleManager::reset()
{
  mStyles.insert( QString(), QgsMapLayerStyle() ); // insert entry for the default current style
  mCurrentStyle.clear();
}
void QgsMapLayerStyleManager::reset()
{
  mStyles.insert( defaultStyleName(), QgsMapLayerStyle() ); // insert entry for the default current style
  mCurrentStyle = defaultStyleName();
}