According to the source, what advice did Gajanan Maharaj give to Ratanji to help him have a son?

The provided source material from Chapter 14 makes no mention of Gajanan Maharaj giving any advice to Ratanji. In fact, Gajanan Maharaj is not mentioned at all. The text clearly states that Ratanji, a merchant who was inwardly tormented by his lack of a son, revealed the secret of his heart to Das Ganu. It was Das Ganu who advised him, "Go to Shirdi; you will obtain your heart's desire." The advice was to seek the darshan and blessings of Sai Baba, not Gajanan Maharaj, to resolve his sorrow.