Пространство имен Bitrix\Main\UI

Пространства имен
namespace	AccessRights
namespace	EntitySelector
namespace	Filter
namespace	ImageEditor
namespace	Selector
namespace	Uploader
namespace	Viewer

Классы
class	AdminPageNavigation
class	Copyright
class	Extension
class	FileInput
class	FileInputReceiver
class	FileInputUnclouder
class	FileInputUtility
class	PageNavigation
class	ReversePageNavigation
class	SessionExpander
class	Spotlight
class	Tour