message texts. get_message_categories [...] or without message [...] message keys defined in
_files = None , * additional_categories [...] additional categories [...] ScriptProjectArchiveCategories
UpdateFlags ScriptProjects ScriptProjectArchiveCategories [...] ScriptMessage Piece
UpdateFlags ScriptProjects ScriptProjectArchiveCategories [...] ScriptMessage Piece [...] ArchiverSkippedEventInfo SvnArchiverMessage