According to Chapter 11, what specific methods did Sai Baba use to help his devotees realize the Nirguna (formless) aspect of reality?

Chapter 11 details several methods Sai Baba employed to guide his devotees from devotion to his physical form (Saguna) towards the realization of the formless (Nirguna). The purpose of these practices was to cultivate a deep longing for the Nirguna within them. As described in the chapter, Baba would sometimes send a devotee to another country or confine another to solitude right in Shirdi. He might also lock a devotee in the Wada (lodging) or assign them the specific task of reading scriptures. By practicing these disciplines for years, the devotee's mind would become constantly occupied with Baba's company, regardless of physical proximity, thereby focusing on the eternal rather than the perishable body, as mentioned in chapter 11.