---
title: "Validators - Example 1"
canonical: "https://support.appfire.com/space/PSCONF/15305694/Validators%20-%20Example%201"
format: markdown
---
> Macro (aura-html)

> Macro (excerpt)
> 
> ```
> string errorMsg = "Issue must have subtasks!";
> if(size(subtasks(key)) == 0) {
>     return false, errorMsg;
> }
> ```