What advice did Das Ganu give to Ratanji, and what was the outcome?

Ratanji, who was always sad because he had no son, had great faith in Das Ganu and confided in him about his deep-seated worry. As described in Chapter 14, Das Ganu advised him to go to Shirdi to meet Sai Baba. Ganu assured him, "Go to Shirdi; you will obtain your heart's desire." He instructed Ratanji to take Baba's darshan, bow at His feet, and explain his problem, promising that Baba would bless him and fulfill his wish. This idea appealed to Ratanji, who then resolved to make the journey, and a few days later, he arrived in Shirdi to meet the saint.