delegateSetProperty  
  fun delegateSetProperty(object: <Error class: unknown class>, propId: <Error class: unknown class>, value: <Error class: unknown class>, pspec: <Error class: unknown class>): Boolean(source)
Sets a property on the GtkEditable delegate for @object.
This is a helper function that should be called in the set_property function of your GtkEditable implementation, before handling your own properties.
Return
true if the property was found
Parameters
object
a GObject
propId 
a property ID
value
value to set
pspec
the GParamSpec for the property