According to the source material from Chapter 11, what specific methods did Sai Baba use to guide his devotees from Saguna devotion towards the realization of the Nirguna?

Chapter 11 of the Shri Sai Satcharitra details several methods Sai Baba employed to help his devotees transition from attachment to his physical form (Saguna) towards an understanding of the formless Absolute (Nirguna). To cultivate this deeper realization, Baba would use various means according to each devotee's eligibility. The text explicitly mentions that he would send one devotee to another country, confine another to solitude within Shirdi, lock someone in the Wada, or assign them the task of reading scriptures. As Chapter 11 explains, by practicing these disciplines over many years, the devotees' longing for the Nirguna would grow, and their minds would become constantly occupied with Baba’s spiritual company, transcending his physical presence.