gtk:string-sorter-expression (object)

object -- a gtk:string-sorter object
expression -- a gtk:expression instance, or (cffi:null-pointer)

Accessor of the expression slot of the gtk:string-sorter class. The gtk:string-sorter-expression function gets the expression that is evaluated to obtain strings from items. The (setf gtk:string-sorter-expression) function sets the expression. The expression must have the "gchararray" type.