public function is_duplicate_wp_cron_event( $event ) {
		$cron = _get_cron_array();
		foreach ( $cron as $timestamp => $cronhooks ) {
			if ( key( $cronhooks ) === $event ) {
				$this->is_cron_overdue( $cron, $timestamp );

				return true;
			}
		}

		return false;
	}