class_docstr: A functional visitor over Type.
  
  The default behavior recursively traverses the AST
  and reconstructs the AST.
code: def visit_type_data(self, td):
      return TypeData(
          self.visit(td.header),
          [self.visit(type_var) for type_var in td.type_vars],
          td.constructors,
      )
  
imports: from .ty import TypeVar, IncompleteType, TensorType, FuncType, TupleType, TypeRelation, RefType, GlobalTypeVar, TypeCall
  from .adt import TypeData
label_desc: Use image node_id 10 for calling the TypeMutator obj's underlying member method code with example usage: obj.visit_type_data(td) and returns: TypeData