@NotNull
  private Library getSourceOrThis() {
    final InvocationHandler invocationHandler = Proxy.isProxyClass(myLibrary.getClass()) ? Proxy.getInvocationHandler(myLibrary) : null;
    final Library realLibrary = invocationHandler instanceof ModuleEditor.ProxyDelegateAccessor ?
                                (Library)((ModuleEditor.ProxyDelegateAccessor)invocationHandler).getDelegate() : myLibrary;
    final Library source = realLibrary instanceof LibraryEx? ((LibraryEx)realLibrary).getSource() : null;
    return source != null ? source : myLibrary;
  }
@NotNull
  private Library getSourceOrThis()