PdfDocumentInfo
constructor(title: String? = null, author: String? = null, subject: String? = null, keywords: String? = null, creator: String? = null, producer: String? = null, creationDate: PdfDate? = null, modDate: PdfDate? = null, trapped: PdfDocumentInfo.Trapped = Trapped.Unknown, custom: Map<String, String> = emptyMap())