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    GObject
    ╰── EMailFormatterExtension
        ├── EMailFormatterPrintExtension
        ╰── EMailFormatterQuoteExtension
gboolean e_mail_formatter_extension_format (EMailFormatterExtension *extension,EMailFormatter *formatter,EMailFormatterContext *context,EMailPart *part,GOutputStream *stream,GCancellable *cancellable);
A virtual function reimplemented in all mail formatter extensions. The
function formats part
, generated HTML (or other format that can be
displayed to user) and writes it to the stream
.
When the function is unable to format the part
 (either because it's broken
or because it is a different mimetype then the extension is specialized
for), the function will return FALSE
 indicating the EMailFormatter, that
it should pick another extension.
Implementation of this function must be thread-safe.
| extension | ||
| formatter | ||
| context | ||
| part | an EMailPart to be formatter | |
| stream | a GOutputStream to which the output should be written | |
| cancellable | (allow-none) a GCancellable | 
struct EMailFormatterExtension;
The EMailFormatterExtension is an abstract class for all extensions for EMailFormatter.