class_docstr: Parses compiler directives and converts them into AST annotations.
code: def visit_Assign(self, node):
      self.state[_LoopScope].statements_visited += 1
      return self.generic_visit(node)
  
imports: import inspect
  import gast
  from tensorflow.python.autograph.core import converter
  from tensorflow.python.autograph.lang import directives
  from tensorflow.python.autograph.pyct import anno
  from tensorflow.python.util import tf_inspect
label_desc: Use image node_id 5 for calling the DirectivesTransformer obj's underlying member method code with example usage: obj.visit_Assign(node) and returns: self