docs: def BuildChecks(self, request):
      """Parses request and returns a list of filter callables.
  
      Each callable will be called with the StatEntry and returns True if the
      entry should be suppressed.
  
      Args:
        request: A FindSpec that describes the search.
  
      Returns:
        a list of callables which return True if the file is to be suppressed.
      """
      result = []
      if request.HasField("start_time") or request.HasField("end_time"):
  
        def FilterTimestamp(file_stat, request=request):
          return file_stat.HasField("st_mtime") and (
              file_stat.st_mtime < request.start_time or
              file_stat.st_mtime > request.end_time)
  
        result.append(FilterTimestamp)
  
      if request.HasField("min_file_size") or request.HasField("max_file_size"):
  
        def FilterSize(file_stat, request=request):
          return file_stat.HasField("st_size") and (
              file_stat.st_size < request.min_file_size or
              file_stat.st_size > request.max_file_size)
  
        result.append(FilterSize)
  
      if request.HasField("perm_mode"):
  
        def FilterPerms(file_stat, request=request):
          return (file_stat.st_mode & request.perm_mask) != request.perm_mode
  
        result.append(FilterPerms)
  
      if request.HasField("uid"):
  
        def FilterUID(file_stat, request=request):
          return file_stat.st_uid != request.uid
  
        result.append(FilterUID)
  
      if request.HasField("gid"):
  
        def FilterGID(file_stat, request=request):
          return file_stat.st_gid != request.gid
  
        result.append(FilterGID)
  
      if request.HasField("path_regex"):
        regex = request.path_regex
  
        def FilterPath(file_stat, regex=regex):
          """Suppress any filename not matching the regular expression."""
          return not regex.Search(file_stat.pathspec.Basename())
  
        result.append(FilterPath)
  
      if request.HasField("data_regex"):
  
        def FilterData(file_stat, **_):
          """Suppress files that do not match the content."""
          return not self.TestFileContent(file_stat)
  
        result.append(FilterData)
  
      return result