code: private Method lookupRpcMethod(final String methodName, final Class<?>[] parameterTypes) throws NoSuchMethodException {
  		return rpcEndpoint.getClass().getMethod(methodName, parameterTypes);
  	}
docs: Look up the rpc method on the given {@link RpcEndpoint} instance.
  
  @param methodName Name of the method
  @param parameterTypes Parameter types of the method
  @return Method of the rpc endpoint
  @throws NoSuchMethodException Thrown if the method with the given name and parameter types
  cannot be found at the rpc endpoint