Dump all values
        Return:
            <generator> <int> val

def values(self):
        """Dump all values
        Return:
            <generator> <int> val
        """
        table_id = 0
        get = self.get___method
        for cell_id in range(self.width):
            val = get(self, table_id, cell_id)
            if val:
                yield val