* @example\r
* // Use the classes 'Indent1', 'Indent2', 'Indent3'\r
* config.indentClasses = ['Indent1', 'Indent2', 'Indent3'];\r
* @example\r
* // Use the classes 'Indent1', 'Indent2', 'Indent3'\r
* config.indentClasses = ['Indent1', 'Indent2', 'Indent3'];\r