What role does Goddess Saraswati play in the opening of the Shri Sai Satcharitra, and how is she related to Sai Baba?

Chapter 1 explains that Goddess Saraswati, the daughter of Brahma, is invoked for her grace in the creation of literature. She is described as the Goddess of Speech and the Mother of the World, without whose blessing the author feels he could not write the book. She is depicted holding the Brahma-veena, riding a swan, and wearing white clothes. The author prays for her to make him an instrument to 'feed the nectar of the life of the capable Sai to everyone.' Similar to the identification with Ganesha, Chapter 1 also states that 'Sai himself is Goddess Saraswati,' who holds the Omkara-veena and sings his own life story for the salvation of his devotees.