private void updateDomObj(WXComponent component){
  if (component == null) {
    return;
  }
  WXDomObject domObject=mRegistry.get(component.getRef());
  if (domObject == null) {
    return;
  }
  domObject.old();
  component.updateDom(domObject.clone());
  if (component instanceof WXVContainer) {
    WXVContainer container=(WXVContainer)component;
    int count=container.childCount();
    for (int i=0; i < count; ++i) {
      updateDomObj(container.getChild(i));
    }
  }
}

private void updateDomObj ( WXComponent component ) { if ( component == null ) { return ; } WXDomObject domObject = mRegistry . get ( component . getRef ( ) ) ; if ( domObject == null ) { return ; } domObject . old ( ) ; component . updateDom ( domObject . clone ( ) ) ; if ( component instanceof WXVContainer ) { WXVContainer container = ( WXVContainer ) component ; int count = container . childCount ( ) ; for ( int i = 0 ; i < count ; ++ i ) { updateDomObj ( container . getChild ( i ) ) ; } } }
update the specified component ' s dom and mark it as old .
