code: def func_expr(self):
      return self._func_expr
  
imports: from __future__ import annotations
  from typing import Union
  from evadb.expression.abstract_expression import AbstractExpression
  from evadb.expression.function_expression import FunctionExpression
  from evadb.parser.alias import Alias
  from evadb.parser.select_statement import SelectStatement
  from evadb.parser.types import JoinType
label_desc: Use image node_id 2 for calling the TableValuedExpression obj's underlying member method code with example usage: obj.func_expr() and returns: self