urces table & version stored in options table on update to 3.12
	 *
	 * @since 3.12
	 *
	 * @param string $new_version New plugin version.
	 * @param string $old_version Previous plugin version.
	 *
	 * @return void
	 */
	public function drop_resources_table( $new_version, $old_version ) {
		if ( version_compare( $old_version, '3.12', '>=' ) ) {
			return;
		}

		$this->database->drop_resources_table();
	}

	/**
	 * Displays a notice if the used CSS folder is not writable
	 *
	 * @since 3.11.4
	 *
	 * @return void
	 */
	public function notice_write_permissions() {
		$this->used_css->notice_write_permissions();
	}

	/**
	 * Display a notice on table missing.
	 *
	 * @return void
	 */
	public function display_no_table_notice() {
		$this->settings->display_no_table_notice();
	}

	/**
	 * Maybe delete transient.
	 *
	 * @param mixed $old_value Option old value.
	 * @param mixed $value     Option new value.
	 *
	 * @return void
	 */
	public function maybe_delete_transient( $old_value, $value ) {
		if ( ! isset( $old_value['remove_unused_css'], $value['remove_unused_css'] ) ) {
			return;
		}

		if ( 1 === (int) $value['remove_unused_css'] ) {
			return;
		}

		if ( $old_value['remove_unused_css'] === $value['remove_unused_css'] ) {
			return;
		}

		delete_transient( 'wp_rocket_no_licence' );
	}

	/**
	 * Checks if the RUCSS deletion is enabled.
	 *
	 * @return bool
	 */
	protected function is_deletion_enabled(): bool {
		/**
		 * Filters the enable RUCSS deletion value
		 *
		 * @param bool $delete_rucss True to enable deletion, false otherwise.
		 */
		return (bool) apply_filters( 'rocket_rucss_deletion_enabled', true );
	}
}