gtk:widget-path-iter-object-name (path pos)

path -- a gtk:widget-path instance
pos -- an integer with the position, -1 for the path head
name -- a string with the object name to set or nil to unset

Accessor of the object name. The gtk:widget-path-iter-object-name function returns the object name that is at position pos in the widget hierarchy defined in path. The (setf gtk:widget-path-iter-object-name) function sets the object name. When set, the object name overrides the object type when matching CSS.