def build_densepose_embedder(cfg: CfgNode) -> Optional[nn.Module]:
    """
    Build embedder used to embed mesh vertices into an embedding space.
    Embedder contains sub-embedders, one for each mesh ID.

    Args:
        cfg (cfgNode): configuration options
    Return:
        Embedding module
    """
    if cfg.MODEL.ROI_DENSEPOSE_HEAD.CSE.EMBEDDERS:
        return Embedder(cfg)
    return None

    Build embedder used to embed mesh vertices into an embedding space.
    Embedder contains sub-embedders, one for each mesh ID.

    Args:
        cfg (cfgNode): configuration options
    Return:
        Embedding module
    
EVA-02/det/projects/DensePose/densepose/modeling/build.py