def register_classes():
    """Register these classes with the `LinkFactory` """
    Gtlink_select.register_class()
    Gtlink_bin.register_class()
    Gtlink_expcube2.register_class()
    Gtlink_scrmaps.register_class()
    Gtlink_mktime.register_class()
    Gtlink_ltcube.register_class()
    Link_FermipyCoadd.register_class()
    Link_FermipyGatherSrcmaps.register_class()
    Link_FermipyVstack.register_class()
    Link_FermipyHealview.register_class()
    Gtexpcube2_SG.register_class()
    Gtltsum_SG.register_class()
    SumRings_SG.register_class()
    Vstack_SG.register_class()
    GatherSrcmaps_SG.register_class()
    Healview_SG.register_class()