code: def parse_future_features(mod):
    
    assert isinstance(mod, ast.Module)
    found_docstring = False
    for node in mod.body:
      if isinstance(node, ast.ImportFrom):
        if node.module == '__future__':
          return node, _make_future_features(node)
        break
      elif isinstance(node, ast.Expr) and not found_docstring:
        if not isinstance(node.value, ast.Str):
          break
        found_docstring = True
      else:
        break
    return None, FutureFeatures()
docs: Accumulates a set of flags for the compiler __future__ imports.