'Get all LangZones for debugging'

def get_all_zones(self):

    if self._catalogs_zone:
        (yield self._catalogs_zone)
    if self._stdlibs_zone:
        (yield self._stdlibs_zone)
    for zone in self._lang_zone_from_lang.values()[:]:
        (yield zone)
    for zone in self._proj_zone_from_proj_path.values()[:]:
        (yield zone)
