def get_request_extensions(self):
        request_exts = []
        for ext in self.extensions.values():
            request_exts.extend(ext.get_request_extensions())
        return request_exts
Go through all of the reservations and filter to only return those
dataset/ETHPy150Open openstack/neutron/neutron/api/extensions.py/ExtensionManager.get_request_extensions--crossover with--dataset/ETHPy150Open spulec/moto/moto/ec2/models.py/InstanceBackend.get_reservations_by_instance_ids