Set.connectValidateSet

gulong connectValidateSet(T)(T callback,  Flag!"After" after =  No.After) if (isCallable!T
    &&  is(ReturnType!T ==  glib.error.ErrorWrap)
   && (Parameters!T.length <  1 || (ParameterStorageClassTuple!T[0]  ==  ParameterStorageClass.none &&  is(Parameters!T[0] :  gda.set.Set)))
   &&  Parameters!T.length <  2)

Connect to ValidateSet signal.

Gets emitted when gda.set.Set.isValid is called, use this signal to control which combination of values set's holder can have (for example to implement some business rules)

Parameters

`callback`	signal callback delegate or function to connect `glib.error.ErrorWrap callback(gda.set.Set set)` `set` the instance the signal is connected to (optional) `Returns` NULL if set's contents has been validated, or a #GError otherwise.
`after`	Yes.After to execute callback after default handler, No.After to execute before (default)

Returns

Signal ID