Can you summarize the main themes and events described in Chapter 42 of the Sai Satcharitra?

Chapter 42 of the Sai Satcharitra serves as a transition from praising Sai Baba's divine play to the solemn account of his passing. The chapter opens with salutations and describes Sai as a 'Wish-fulfilling Tree' who helps devotees cross the 'river of worldly existence.' It emphasizes that by remembering the Sadguru's feet, all obstacles and sorrows dissolve. The primary focus, as stated in the chapter, is to describe Sai's nature and then provide a detailed account of him leaving his body. It blesses the people of Shirdi for experiencing his company and sets the stage for the narration of his Mahasamadhi.