def process_all(self):
"""Call process method for all Data instance"""
start = datetime.datetime.now()
for _, d in self.data.items():
d.process()
end = datetime.datetime.now()
self.app.report_update_phase('Generate', {'start': date_to_json(start),
'end': date_to_json(end),
'duration': date_to_json(end - start)})
