Add an abstract register_rest_endpoint method to enforce its use

Author: aristath

classes/rest/class-base.php

@@ -19,6 +19,15 @@ public function __construct() {
 		\add_action( 'rest_api_init', [ $this, 'register_rest_endpoint' ] );
 	}
 
+	/**
+	 * Register REST endpoint.
+	 *
+	 * Child classes must implement this method to define their REST endpoints.
+	 *
+	 * @return void
+	 */
+	abstract public function register_rest_endpoint();
+
 	/**
 	 * Get client IP address.
 	 *