docs: def Parse(self, stat, file_obj, knowledge_base):
      """Identifies the paths set within a file.
  
      Expands paths within the context of the file, but does not infer fully
      expanded paths from external states. There are plenty of cases where path
      attributes are unresolved, e.g. sourcing other files.
  
      Lines are not handled literally. A field parser is used to:
      - Break lines with multiple distinct statements into separate lines (e.g.
        lines with a ';' separating stanzas.
      - Strip out comments.
      - Handle line continuations to capture multi-line configurations into one
        statement.
  
      Args:
        stat: statentry
        file_obj: VFSFile
        knowledge_base: unused
  
      Yields:
        An attributed dict for each env vars. 'name' contains the path name, and
        'vals' contains its vals.
      """
      _ = knowledge_base
      lines = self.parser.ParseEntries(utils.ReadFileBytesAsUnicode(file_obj))
      if os.path.basename(stat.pathspec.path) in self._CSH_FILES:
        paths = self._ParseCshVariables(lines)
      else:
        paths = self._ParseShVariables(lines)
      for path_name, path_vals in iteritems(paths):
        yield rdf_protodict.AttributedDict(
            config=stat.pathspec.path, name=path_name, vals=path_vals)