private static Sample newSample(String name,
                                        ImmutableMap<String, String> labels,
                                        long timestamp,
                                        double newValue) {
            return Sample.builder()
                         .value(newValue)
                         .labels(labels)
                         .timestamp(timestamp)
                         .name(name)
                         .build();
        }
The parsing context holds key results more than sample collection.
oap-server/analyzer/meter-analyzer/src/main/java/org/apache/skywalking/oap/meter/analyzer/dsl/SampleFamily.java