Can you describe the story of how Sai Baba attended his devotee Dev's Udyapan ceremony in disguise?

The story from Chapter 40 recounts how a devotee named Dev, holding an Udyapan ceremony, invited Sai Baba. Baba promised to attend with two others. On the day of the feast, a Sanyasi, who was Baba in disguise, appeared with two companions. Dev served them a satisfying meal along with all the customary rituals, but he failed to recognize Baba. Feeling disappointed that Baba hadn't come as promised, Dev wrote a letter of complaint to Jog. Baba then revealed through Jog that he had indeed kept his word, appearing as the Sanyasi. Dev was filled with remorse and awe upon realizing his failure to recognize his master.