RestoreDefinition.
        Restores a deleted definition
        :param str project: Project ID or project name
        :param int definition_id: The identifier of the definition to restore.
        :param bool deleted: When false, restores a deleted definition.
        :rtype: :class:`<BuildDefinition> <azure.devops.v5_0.build.models.BuildDefinition>`

def restore_definition(self, project, definition_id, deleted):
        """RestoreDefinition.
        Restores a deleted definition
        :param str project: Project ID or project name
        :param int definition_id: The identifier of the definition to restore.
        :param bool deleted: When false, restores a deleted definition.
        :rtype: :class:`<BuildDefinition> <azure.devops.v5_0.build.models.BuildDefinition>`
        """
        route_values = {}
        if project is not None:
            route_values['project'] = self._serialize.url('project', project, 'str')
        if definition_id is not None:
            route_values['definitionId'] = self._serialize.url('definition_id', definition_id, 'int')
        query_parameters = {}
        if deleted is not None:
            query_parameters['deleted'] = self._serialize.query('deleted', deleted, 'bool')
        response = self._send(http_method='PATCH',
                              location_id='dbeaf647-6167-421a-bda9-c9327b25e2e6',
                              version='5.0',
                              route_values=route_values,
                              query_parameters=query_parameters)
        return self._deserialize('BuildDefinition', response)