code: def _sum(Xp: Padded, Yp: Padded) -> Padded:
      return Padded(
          Xp.data + Yp.data, Xp.size_at_t, Xp.lengths, Xp.indices
      )
  
file_path: thinc/thinc/layers/bidirectional.py
imports: from typing import Callable, Optional, Tuple, cast
  from ..backends import Ops
  from ..config import registry
  from ..model import Model
  from ..types import Padded
label_desc: Use image node_id 7 for calling a global function with example usage: _sum(Xp, Yp) and returns: Padded