You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: client_options.go
    path of file: ./repos/go-grpc-middleware/providers/prometheus
    
    the code of the file until where you have to start completion: // Copyright (c) The go-grpc-middleware Authors.
// Licensed under the Apache License 2.0.

package prometheus

import (
	"github.com/prometheus/client_golang/prometheus"
)

type clientMetricsConfig struct {
	counterOpts counterOptions
	// clientHandledHistogram can be nil.
	clientH
    
func WithClientHandlingTimeHistogram(opts ...HistogramOption) ClientMetricsOption {
	return func(o *clientMetricsConfig) {
		o.clientHandledHistogram = prometheus.NewHistogramVec(
			histogramOptions(opts).apply(prometheus.HistogramOpts{
				Name:    "grpc_client_handling_seconds",
				Help:    "Histogram of response latency (seconds) of the gRPC until it is finished by the application.",
				Buckets: prometheus.DefBuckets,
			}),
			[]string{"grpc_type", "grpc_service", "grpc_method"},
		)
	}
}