gtk:widget-name (object)

object -- a gtk:widget object
name -- a string for the name of the widget

The accessor for the name slot gets or sets the name of the widget.

Widgets can be named, which allows you to refer to them from a CSS file. You can apply a style to widgets with a particular name in the CSS file. Note that the CSS syntax has certain special characters to delimit and represent elements in a selector (period, #, >, *...), so using these will make your widget impossible to match by name. Any combination of alphanumeric symbols, dashes and underscores will suffice.