code: public void popContextClassLoader(Object origLoader) {
          if (origLoader != UNCHANGED) {
              setContextClassLoader(Thread.currentThread(), (ClassLoader) origLoader);
          }
      }
docs: Resets the context class loader of the current thread after a call to {@link #pushContextClassLoader} or {@link #repushContextClassLoader}.
  This method does nothing if the specified class loader is {@link #UNCHANGED}. Otherwise, this method is equivalent to calling {@link #setContextClassLoader}.
  
  @param origLoader the result of {@link #pushContextClassLoader} or {@link #repushContextClassLoader}