exporters/metrics/src/main/java/com/google/cloud/opentelemetry/metric/InternalMetricExporter.java (2 lines):
	- line 222: // TODO: Filter metrics by last updated time....
	- line 249: // TODO: better error reporting.


detectors/resources/src/main/java/com/google/cloud/opentelemetry/detectors/GCPResource.java (1 line):
	- line 164: // TODO: Figure out how to handle unexpected conditions like this - Issue #183


exporters/trace/src/main/java/com/google/cloud/opentelemetry/trace/InternalTraceExporter.java (1 line):
	- line 74: // TODO: Remove stub - tracked in issue #198