I'm working on a project which I want to build up OO. Now I came with a function that checks or a value is valid.

private function valid(value:*, acceptedValues:Array):Boolean {
   for(var i:uint = 0; i < acceptedValues.length; i++) {
        if (value == acceptedValues[i]) {
            return true;
        }
    }
    return false;
}

As you can see, the function is very general and will be accessed across different classes. Now my question is; where do I store it in a OO correct way?

Thanks in advance!