Why did Das Ganu advise Ratanji to visit Gajanan Maharaj for his problem of not having a son?

The source text from Chapter 14 indicates that Das Ganu advised Ratanji to visit Sai Baba of Shirdi, not Gajanan Maharaj. When Ratanji confided in Das Ganu about his deep sadness over being without a son, Das Ganu explicitly said, 'Go to Shirdi; you will obtain your heart's desire.' He instructed Ratanji to take Sai Baba's darshan, bow at His feet, and explain his situation, expressing full confidence in Baba's 'inconceivable handiwork' to resolve the merchant's problem. The provided chapters make no mention of Gajanan Maharaj in this context at all.