[ CCode ( has_construct_function = false , type = "GtkExpression*" ) ]
public PropertyExpression.for_pspec (owned Expression? expression, ParamSpec pspec)
Creates an expression that looks up a property.
The object to use is found by evaluating the `expression`, or using the `this` argument when `expression` is `NULL`.
If the resulting object conforms to `this_type`, its property specified by `pspec` will be queried. Otherwise, this expression's evaluation will fail.
| expression |
Expression to evaluate to get the object to query or `NULL` to query the `this` object |
| pspec |
the `GParamSpec` for the property to query |
|
a new `GtkExpression` |