public IsolatedClassLoader deleteLoader(){
  IsolatedClassLoader l=loader;
  if (loader != null) {
    loader.clear();
  }
  loader=null;
  return l;
}

public IsolatedClassLoader deleteLoader ( ) { IsolatedClassLoader l = loader ; if ( loader != null ) { loader . clear ( ) ; } loader = null ; return l ; }
sets the internal class loader reference to null and returns the last strong reference to it .
