See https://github.com/awslabs/aws-embedded-metrics-node/issues/15 https://github.com/awslabs/aws-embedded-metrics-python/blob/6cf02e6a5b1849be7aaa5300f2ec9425c5fbc398/aws_embedded_metrics/logger/metrics_logger.py#L44
