Gets a header field on message.
The caller is responsible for checking the type of the returned glib.Variant matches what is expected.
A 8-bit unsigned integer (typically a value from the GDBusMessageHeaderField enumeration)
A glib.Variant with the value if the header was found, NULL otherwise. Do not free, it is owned by message.
2.26
Gets a header field on message.
The caller is responsible for checking the type of the returned glib.Variant matches what is expected.