[
 (program) {
  (function_definition) {
   (decl_specifiers) {
    (builtintype) {
     void
    }
   }
   (lvalue) {
    test
   }
   (formal_args_list) {
    (
    )
   }
   (function_body) {
    {
    (stmt_list) {
     (expression_statement) {
      (expr_function_call) {
       test
       (
       )
      }
      ;
     }
    }
    }
   }
  }
  (function_definition) {
   (decl_specifiers) {
    (builtintype) {
     void
    }
   }
   (lvalue) {
    test
   }
   (formal_args_list) {
    (
    )
   }
   ;
  }
 }
]