class_docstr: Japanese search implementation: uses no stemmer, but word splitting is quite
  complicated.
class_docstr_tok: ["Japanese","search","implementation",":","uses","no","stemmer",",","but","word","splitting","is","quite","complicated","."]
code: def word_filter(self, stemmed_word: str) -> bool:
      return len(stemmed_word) > 1
  
imports: from __future__ import annotations
  import os
  import re
  import sys
  from typing import TYPE_CHECKING, Any, Dict, List
  from sphinx.errors import ExtensionError, SphinxError
  from sphinx.search import SearchLanguage
  from sphinx.util import import_object
label_desc: Use image node_id 3 for calling the SearchJapanese obj's underlying member method code with example usage: obj.word_filter(stemmed_word) and returns: unknown