code: func ProxyMethod(L *lua.State) int {
  	if !isValueProxy(L, 1) {
  		L.PushNil()
  		return 1
  	}
  	v, _ := valueOfProxy(L, 1)
  	name := L.ToString(2)
  	pushGoMethod(L, name, v)
  	return 1
  }
docs: // ProxyMethod pushes the proxy method on the stack.
  //
  // Argument: proxy
  //
  // Returns: method (function)