Returns the joined path from the given model index.  This will
        join together the full path with periods.
        
        :param      index | <QModelIndex>
        
        :return     <str>

def pathFromIndex(self, index):
        """
        Returns the joined path from the given model index.  This will
        join together the full path with periods.
        
        :param      index | <QModelIndex>
        
        :return     <str>
        """
        out  = []
        while index and index.isValid():
            out.append(nativestring(unwrapVariant(index.data())))
            index = self._model.parent(index)
        
        return self.joiner().join(reversed(out))