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wp-content/plugins/brizy/admin/migrations/migration-interface.php

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+<?php
+
+interface Brizy_Admin_Migrations_MigrationInterface {
+
+	/**
+	 * Return the version
+	 *
+	 * @return mixed
+	 */
+	public function getVersion();
+
+	/**
+	 * Run this method when upgrading.
+	 *
+	 * @return mixed
+	 */
+	public function execute();
+
+
+	/**
+	 * @return mixed
+	 */
+	public function getPriority();
+
+}