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