Applying custom CSS to disabled RadzenHtmlEditor

Most Radzen form components seem to apply the class 'rz-state-disabled' when disabled, however as far as I can tell the RadzenHtmlEditor doesn't do this. I would like to add some custom CSS to make it more obvious when the HtmlEditor is disabled (like the grey background that's applied to dropdowns). Would it be possible to get the HtmlEditor to apply the rz-state-disabled class when applicable?