gtk:bool-filter-invert (object)

object -- a gtk:bool-filter object
invert -- true to invert

Accessor of the invert slot of the gtk:bool-filter class. The gtk:bool-filter-invert function returns whether the filter inverts the expression. The (setf gtk:bool-filter-expression) function sets whether the filter should invert the expression. If no expression is set, this function returns the cffi:null-pointer value. To unset the expression for the bool filter, use the cffi:null-pointer value.