gtk:widget-class-css-name (gtype)

gtype -- a g:type-t type ID
name -- a string for the CSS name

The gtk:widget-class-css-name function gets the name used by this widget class for matching in CSS code. The (setf gtk:widget-class-css-name) function sets the name. If this function is not called for a given class, the name of the parent class is used.