# Copyright (c) OpenMMLab. All rights reserved.
import warnings  # noqa: F401,F403

from mmcv.utils import Registry

TRANSFORMER = Registry('Transformer')
MASK_ASSIGNERS = Registry('mask_assigner')
MATCH_COST = Registry('match_cost')


def build_match_cost(cfg):
    """Build Match Cost."""
    return MATCH_COST.build(cfg)


def build_assigner(cfg):
    """Build Assigner."""
    return MASK_ASSIGNERS.build(cfg)


def build_transformer(cfg):
    """Build Transformer."""
    return TRANSFORMER.build(cfg)