@Override public String toString(){
  StringBuilder sb=new StringBuilder();
  for (  IRenderer renderer : childRenderers) {
    sb.append(renderer.toString());
  }
  return sb.toString();
}

@ Override public String toString ( ) { StringBuilder sb = new StringBuilder ( ) ; for ( IRenderer renderer : childRenderers ) { sb . append ( renderer . toString ( ) ) ; } return sb . toString ( ) ; }
returns a string representation of the renderer .
