class_docstr: Give suggestions based on the lines in the history.
class_docstr_tok: ["Give","suggestions","based","on","the","lines","in","the","history","."]
code: def get_suggestion(
      self, buffer: Buffer, document: Document
  ) -> Suggestion | None:
      history = buffer.history
  
      # Consider only the last line for the suggestion.
      text = document.text.rsplit("\n", 1)[-1]
  
      # Only create a suggestion when this is not an empty line.
      if text.strip():
          # Find first matching line in history.
          for string in reversed(list(history.get_strings())):
              for line in reversed(string.splitlines()):
                  if line.startswith(text):
                      return Suggestion(line[len(text) :])
  
      return None
  
imports: from __future__ import annotations
  from abc import ABCMeta, abstractmethod
  from typing import TYPE_CHECKING, Callable
  from prompt_toolkit.eventloop import run_in_executor_with_context
  from .document import Document
  from .filters import Filter, to_filter
label_desc: Use image node_id 1 for calling the AutoSuggestFromHistory obj's underlying member method code with example usage: obj.get_suggestion(buffer, document) and returns: None, Suggestion