metrics
Enables or disables enhanced resolver metrics for specified resolvers. Note that `MetricsConfig` won't be used unless the `resolverLevelMetricsBehavior` value is set to `PER_RESOLVER_METRICS`. If the `resolverLevelMetricsBehavior` is set to `FULL_REQUEST_RESOLVER_METRICS` instead, `MetricsConfig` will be ignored. However, you can still set its value.