updated plugin GP Premium version 2.5.0

wp-content/plugins/gp-premium/inc/class-singleton.php

@@ -0,0 +1,58 @@
+<?php
+/**
+ * GenerateBlocks Pro singleton class.
+ *
+ * @package Generateblocks
+ */
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit; // Exit if accessed directly.
+}
+
+/**
+ * The Singleton class.
+ */
+abstract class GeneratePress_Pro_Singleton {
+	/**
+	 * Instance.
+	 *
+	 * @access private
+	 * @var array Instances
+	 */
+	private static $instances = array();
+
+	/**
+	 * The Singleton's constructor should always be private to prevent direct
+	 * construction calls with the `new` operator.
+	 */
+	protected function __construct() { }
+
+	/**
+	 * Singletons should not be cloneable.
+	 */
+	protected function __clone() { }
+
+	/**
+	 * Singletons should not be restorable from strings.
+	 *
+	 * @throws Exception Cannot unserialize a singleton.
+	 */
+	public function __wakeup() {
+		throw new Exception( 'Cannot unserialize a singleton.' );
+	}
+
+	/**
+	 * Initiator.
+	 *
+	 * @return object initialized object of class.
+	 */
+	public static function get_instance() {
+		$cls = static::class;
+
+		if ( ! isset( self::$instances[ $cls ] ) ) {
+			self::$instances[ $cls ] = new static();
+		}
+
+		return self::$instances[ $cls ];
+	}
+}