@Override
                        public String load(final String name) {
                            return METRICS_NAME_ESCAPE_PATTERN.matcher(name).replaceAll("_");
                        }
PrometheusMetricConverter converts prometheus metrics to meter-system metrics, then store them to backend storage.
oap-server/analyzer/meter-analyzer/src/main/java/org/apache/skywalking/oap/meter/analyzer/prometheus/PrometheusMetricConverter.java