code: def test_deduplicate_completer():
      def create_completer(deduplicate: bool):
          return merge_completers(
              [
                  WordCompleter(["hello", "world", "abc", "def"]),
                  WordCompleter(["xyz", "xyz", "abc", "def"]),
              ],
              deduplicate=deduplicate,
          )
  
      completions = list(
          create_completer(deduplicate=False).get_completions(
              Document(""), CompleteEvent()
          )
      )
      assert len(completions) == 8
  
      completions = list(
          create_completer(deduplicate=True).get_completions(
              Document(""), CompleteEvent()
          )
      )
      assert len(completions) == 5
  
imports: from __future__ import annotations
  import os
  import re
  import shutil
  import tempfile
  from contextlib import contextmanager
  from prompt_toolkit.completion import CompleteEvent, FuzzyWordCompleter, NestedCompleter, PathCompleter, WordCompleter, merge_completers
  from prompt_toolkit.document import Document
label_desc: Use image node_id 20 for calling a global function with example usage: test_deduplicate_completer() and returns: merge_completers