What role does Goddess Saraswati play in the first chapter of the Sai Satcharitra?

In the first chapter of the Sai Satcharitra, the author invokes Goddess Saraswati, the goddess of speech and literature, seeking her grace to write the book. The author acknowledges that without the "grace of this Goddess of Speech and Mother of the World, can any literature be achieved?" She is described as holding the Brahma-veena, riding a swan, and wearing white clothes. The author prays for her to become the instrument to narrate Sai's life story. Significantly, Chapter 1 also draws a parallel by stating that "Sai himself is Goddess Saraswati, holding the Omkara-veena in hand, singing his own life story for the salvation of his devotees," thereby attributing the source of all knowledge and expression to Sai Baba.