def METHOD_NAME(self):
    # copy of default extensions
    eps = list(super(RegistrableExtensionManager, self).METHOD_NAME())
    # internal extensions
    for iep in self.internal_extensions:
        ep = EntryPoint.parse(iep)
        if ep.name not in [e.name for e in eps]:
            eps.append(ep)
    # registered extensions
    for rep in self.registered_extensions:
        ep = EntryPoint.parse(rep)
        if ep.name not in [e.name for e in eps]:
            eps.append(ep)
    return eps