GObject
        EMailExtensionRegistry
            EMailFormatterExtensionRegistry
            EMailParserExtensionRegistry
        EMailFormatterExtension
            EMailFormatterPrintExtension
            EMailFormatterQuoteExtension
        EMailFormatter
            EMailFormatterPrint
            EMailFormatterQuote
        CamelObject
            CamelMimeFilter
                EMailInlineFilter
                EMailStripSigFilter
        EMailParserExtension
        EMailParser
        EMailPart
            EMailPartAttachmentBar
            EMailPartAttachment
            EMailPartHeaders
            EMailPartImage
        EMailPartList