class_docstr: Clipboard class that can dynamically returns any Clipboard.
  
  :param get_clipboard: Callable that returns a :class:`.Clipboard` instance.
code: def _clipboard(self) -> Clipboard:
      return self.get_clipboard() or DummyClipboard()
  
imports: from __future__ import annotations
  from abc import ABCMeta, abstractmethod
  from typing import Callable
  from prompt_toolkit.selection import SelectionType
label_desc: Use image node_id 2 for calling the DynamicClipboard obj's underlying member method code with example usage: obj._clipboard() and returns: unknown