private void pushMetrics() {
    try {
      pushGateway.pushAdd();
    } catch (final IOException e) {
      LOG.warn("Could not push metrics", e);
    }
  }
Instantiates a new Metrics push gateway service.

@param configuration the configuration
@param metricsSystem the metrics system
metrics/core/src/main/java/org/hyperledger/besu/metrics/prometheus/MetricsPushGatewayService.java