gcontainer: Common parts of a container widget
In gWidgets2: Rewrite of gWidgets API for Simplified GUI Construction

Used as template for documentation

1	gcontainer(container = NULL, ..., toolkit = guiToolkit())

`container`	A parent container. When a widget is created it can be incorporated into the widget heirarchy by passing in a parent container at construction time. (For some toolkits this is not optional, e.g. gWidgets2tcltk or gWidgets2WWW2.)
`...`	These values are passed to the `add` method of the parent container, and occasionally have been used to sneak in hidden arguments to toolkit implementations.
`toolkit`	Each widget constructor is passed in the toolkit it will use. This is typically done using the default, which will lookup the toolkit through `guiToolkit`.