protected function _initializationOptions($options = array()) {
		$defaults = array(
			'_buffer' => true,
			'_css' => true,
			'_cssText' => true,
			'_scripts' => true,
			'_scriptBlock' => false,
			'_editor' => true,
			'_inline' => true,
		);

		return json_encode(array_diff_key(array_merge(
			$defaults,
			(array)$options
		), $defaults));
	}