CreateFunctionQuery 01856_test_function_2 (children 2)
 Identifier 01856_test_function_2
 Function lambda (children 1)
  ExpressionList (children 2)
   Function tuple (children 1)
    ExpressionList (children 1)
     Identifier a
   Function concat (children 1)
    ExpressionList (children 2)
     Identifier a
     Literal \'!!!\'