@abstractmethod<EOL><INDENT>def processWindow(self, window_info, tuples):<DEDENT>
pass<EOL>
The main interface that needs to be implemented.

        This function is called every WINDOW_DURATION_SECS seconds
        and contains the data in the last WINDOW_DURATION_SECS seconds
        in a list tuples

        :type window_info: :class:`WindowContext`
        :param window_info: The information about the window

        :type tuples: :class:`list of Tuples`
        :param tuples: The list of tuples in this window