def enable(self, identifier, exclude_children=False):
        """
        Enable a previously disabled include type

        :param identifier: module or name of the include type
        :param exclude_children: disable the include type only for child processes, not the current process

        The ``identifier`` can be specified in multiple ways to disable an include type.
        See :py:meth:`~.DisabledIncludeTypes.disable` for details.
        """
        import_path = self._identifier2import_path(identifier=identifier)
        if import_path in self._disabled:
            self._enable_path(import_path)
            self._disabled.remove(import_path)
        if not exclude_children and import_path in self._children_disabled:
            self._children_disabled.remove(import_path)
            self._write_child_disabled()