Make sure the first example contains all possible plugin parameters.

Author: jrfnl

example.php

@@ -55,6 +55,7 @@ function my_theme_register_required_plugins() {
 			'force_activation'   => false, // If true, plugin is activated upon theme activation and cannot be deactivated until theme switch.
 			'force_deactivation' => false, // If true, plugin is deactivated upon theme switch, useful for theme-specific plugins.
 			'external_url'       => '', // If set, overrides default API URL and points to an external URL.
+			'is_callable'        => '', // If set, this callable will be be checked for availability to determine if a plugin is active.
 		),
 
 		// This is an example of how to include a plugin from an arbitrary external source in your theme.