Rubric Editor API Events
practice:sources:render
Fires when the sources section within the Test panel is rendered and contains meaningful content.
You would want to listen to this event when you need to post-process specifically the sources content within the Test panel, for example, to trigger math rendering on the sources element.
Examples
rubricEditor.on('practice:sources:render', function () {
// Post-process the sources content, e.g. render math
MathJax.typesetPromise();
});