code: def _set_docs_backend():
      Backend = chainerx.Backend
  
      _docs.set_doc(
          Backend,
          """Pluggable entity that abstracts various computing platforms.
  
  A backend holds one or more :class:`~chainerx.Device`\\ s, each of which
  represents a physical computing unit.
  """,
      )
  
      _docs.set_doc(
          Backend.name,
          """Backend name.
  
  Returns:
      str: Backend name.
  """,
      )
  
      _docs.set_doc(
          Backend.context,
          """Context to which this backend belongs.
  
  Returns:
      ~chainerx.Context: Context object.
  
  """,
      )
  
      _docs.set_doc(
          Backend.get_device,
          """get_device(index)
  Returns a device specified by the given index.
  
  Args:
      index (int): Device index.
  
  Returns:
      ~chainerx.Device: Device object.
  """,
      )
  
      _docs.set_doc(
          Backend.get_device_count,
          """get_device_count()
  Returns the number of devices available in this backend.
  
  Returns:
      int: Number of devices.
  """,
      )
  
label_desc: Use image node_id 1 for calling a global function with example usage: _set_docs_backend() without return types