src/main/java/io/vertx/ext/prometheus/metrics/factories/HistogramFactory.java
public @NotNull Histogram timeSeconds(@NotNull String name) {
    return histograms.computeIfAbsent("vertx_" + name + "_time_seconds", key -> register(Histogram.build(key, "Processing time in seconds")
        .labelNames("local_address")
        .create()));
  }
public @NotNull Histogram timeSeconds(@NotNull String name) {
    return histograms.computeIfAbsent("vertx_" + name + "_time_seconds", key -> register(Histogram.build(key, "Processing time in seconds")
        .labelNames("local_address")
        .create()));
  }
Time histogram.

@param name The name of the histogram, without prefix and suffix.
@return A histogram for http requests, identified by the given name. Histograms with the same name are shared.