What would the propType be of a JSX prop in react : <p>In react you can set the propType of the props that come into a component. For one of my props I want the value to either be null or a line of JSX. The React docs don't cover what propType should be used for JSX.</p>

<p>When testing this I found that it wouldn't throw errors when using the propTypes of object or element. When using another such as symbol I would get an error that said it was an object. If it was an object surely it should complain when it's an element. </p>

<p>What is the correct propType for JSX?</p>
