void setTag(KeyStringValuePair tag) {
        tags.add(tag.getKey().trim() + ":" + tag.getValue().trim());
        originalTags.put(tag.getKey(), tag.getValue());
    }
Endpoint meta and metrics of {@link #destEndpointName} related source. The metrics base on the OAL scripts.
oap-server/analyzer/agent-analyzer/src/main/java/org/apache/skywalking/oap/server/analyzer/provider/trace/parser/listener/EndpointSourceBuilder.java