Customize Panel class.

Constructor.

Checks required user capabilities and whether the theme has the feature support required by the panel.

Check capabilities and render the panel.

Render the panel container, and then its contents (via this->render_content()) in a subclass.

Determines if a sidebar is rendered on the page.

Determine if a widget is rendered on the page.

Constructor.

Recursively search the passed dependency tree for a handle.

Gets the Image Compression quality on a 1-100% scale.