What details are provided in the preface about the author Hemadpant and his contributions to saint biographies?

The preface material from Chapter 0 does not mention an author by the name of Hemadpant. The text discusses the tradition of writing Guru biographies and specifically names two famous poets, Shri Mahipati Maharaj and Shri Dasganu Maharaj, as authors of Marathi works on saints' lives, such as 'Shri Bhaktalilamrut'. While it describes the purpose and types of Guru service through writing, there is no reference to Hemadpant or any of his potential contributions within these specific source chunks.