UnsetWidgetReference[name] removes a widget from the registry with a name in the current interface.
WidgetFill[] is a widget layout placeholder used when adjacent widgets should not dominate the layout space.
WidgetGroup[{content, ...}] specifies custom layout settings for how the content widgets are displayed.
Widget["ComboBox"] represents a combo box.
Widget["List"] represents a list.
Widget["PopupMenu"] represents a popup menu.
Widget["TextArea"] represents a text area.
Widget["ToolBar"] represents a toolbar.
FullReport is an option to hypothesis test functions that specifies whether all report information should be returned.
KnownVariance is an option to statistical confidence interval and hypothesis test functions that specifies the value of the population variance.