class_docstr: Parser for Python source files that extracts TF API exports.
class_docstr_tok: ["Parser","for","Python","source","files","that","extracts","TF","API","exports","."]
code: def visit_Constant(self, node: ast.Constant) -> None:
      if isinstance(node.value, str):
          _, modules = self._extract_docstring(node.value)
          if modules:
              raise BadExportError(
                  f"{self._current_file}:{node.lineno} API docstrings must be"
                  f" at top level of file: {ast.dump(node)}"
              )
      self.generic_visit(node)
  
imports: import ast
  from collections.abc import Sequence
  import re
  from typing import Any, Optional, Union, cast
  from absl import flags
  from absl import logging
  from tensorflow.python.tools.api.generator2.shared import exported_api
label_desc: Use image node_id 15 for calling the Parser obj's underlying member method code with example usage: obj.visit_Constant(node) without return types