@JsonProperty
    public ApdexFormula getApdexFormula() {
        return apdexFormula;
    }
<a href="https://en.wikipedia.org/wiki/Apdex">https://en.wikipedia.org/wiki/Apdex</a>
web/src/main/java/com/navercorp/pinpoint/web/applicationmap/histogram/ApdexScore.java