class_docstr: Default clipboard implementation.
  Just keep the data in memory.
  
  This implements a kill-ring, for Emacs mode.
code: def get_data(self) -> ClipboardData:
      if self._ring:
          return self._ring[0]
      else:
          return ClipboardData()
  
file_path: catboost/contrib/python/prompt-toolkit/py3/prompt_toolkit/clipboard/in_memory.py
imports: from __future__ import annotations
  from collections import deque
  from .base import Clipboard, ClipboardData
label_desc: Use image node_id 3 for calling the InMemoryClipboard obj's underlying member method code with example usage: obj.get_data() and returns: self, ClipboardData