gtk:property-expression-new-for-pspec (expression pspec)

expression -- a gtk:expression instance to evaluate to get the object to query or nil to query the this object
pspec -- a g:param-spec instance for the property to query

The new gtk:expression instance.

Creates an expression that looks up a property via the given expression or the this argument when the expression argument is nil. If the resulting object conforms to the type of this, its property specified by pspec will be queried. Otherwise, the evaluation of the expression will fail.