GetExtensionReports.
        [Preview API] Returns extension reports
        :param str publisher_name: Name of the publisher who published the extension
        :param str extension_name: Name of the extension
        :param int days: Last n days report. If afterDate and days are specified, days will take priority
        :param int count: Number of events to be returned
        :param datetime after_date: Use if you want to fetch events newer than the specified date
        :rtype: object

def get_extension_reports(self, publisher_name, extension_name, days=None, count=None, after_date=None):
        """GetExtensionReports.
        [Preview API] Returns extension reports
        :param str publisher_name: Name of the publisher who published the extension
        :param str extension_name: Name of the extension
        :param int days: Last n days report. If afterDate and days are specified, days will take priority
        :param int count: Number of events to be returned
        :param datetime after_date: Use if you want to fetch events newer than the specified date
        :rtype: object
        """
        route_values = {}
        if publisher_name is not None:
            route_values['publisherName'] = self._serialize.url('publisher_name', publisher_name, 'str')
        if extension_name is not None:
            route_values['extensionName'] = self._serialize.url('extension_name', extension_name, 'str')
        query_parameters = {}
        if days is not None:
            query_parameters['days'] = self._serialize.query('days', days, 'int')
        if count is not None:
            query_parameters['count'] = self._serialize.query('count', count, 'int')
        if after_date is not None:
            query_parameters['afterDate'] = self._serialize.query('after_date', after_date, 'iso-8601')
        response = self._send(http_method='GET',
                              location_id='79e0c74f-157f-437e-845f-74fbb4121d4c',
                              version='5.1-preview.1',
                              route_values=route_values,
                              query_parameters=query_parameters)
        return self._deserialize('object', response)