Gets an array of all header fields on @message that are set.
Return: An array of header fields terminated by %G_DBUS_MESSAGE_HEADER_FIELD_INVALID. Each element is a #guchar. Free with g_free().
2.26
See Implementation
Gets an array of all header fields on @message that are set.
Return: An array of header fields terminated by %G_DBUS_MESSAGE_HEADER_FIELD_INVALID. Each element is a #guchar. Free with g_free().