evaluate
open fun evaluate(this: <Error class: unknown class>? = null, value: <Error class: unknown class>): Boolean
Evaluates the given expression and on success stores the result in @value.
The GType of value will be the type given by method@Gtk.Expression.get_value_type.
It is possible that expressions cannot be evaluated - for example when the expression references objects that have been destroyed or set to NULL. In that case value will remain empty and FALSE will be returned.
Return
TRUE if the expression could be evaluated
Parameters
this
the this argument for the evaluation
value
an empty GValue