CWMetricsToOpenSearch/handler.py (3 lines):
	- line 200: # TODO: Make this multi-domain?
	- line 220: # TODO: Error handling
	- line 246: # TODO: Send a single request rather than 1 per domain/region dimension


CWMetricsToOpenSearch/es_sink/es_transport.py (2 lines):
	- line 83: TODO: implement lower-level request signing for signed HTTP auth
	- line 106: TODO: make the endpoint implicit, as determined by


CWMetricsToOpenSearch/es_sink/es_auth.py (1 line):
	- line 48: # TODO: Move the aws region into this class. Add a test case for region=None