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: metrics-v2_gen.go
    path of file: ./repos/minio/cmd
    
    the code of the file until where you have to start completion: package cmd

// Code generated by github.com/tinylib/msgp DO NOT EDIT.

import (
	"github.com/tinylib/msgp/msgp"
)

// MarshalMsg implements msgp.Marshaler
func (z *MetricDescription) MarshalMsg(b []byte) (o []byte, err error) {
	o = msgp.Require(b, z.Msgsize())
	// map header, size 5
	// string "Namespace"
	o = append(o, 0x85, 0xa9, 0x4e, 0x61, 0x6d, 0x65, 0x73
    
func (z *MetricV2) Msgsize() (s int) {
	s = 1 + 12 + z.Description.Msgsize() + 13 + msgp.MapHeaderSize
	if z.StaticLabels != nil {
		for za0001, za0002 := range z.StaticLabels {
			_ = za0002
			s += msgp.StringPrefixSize + len(za0001) + msgp.StringPrefixSize + len(za0002)
		}
	}
	s += 6 + msgp.Float64Size + 15 + msgp.MapHeaderSize
	if z.VariableLabels != nil {
		for za0003, za0004 := range z.VariableLabels {
			_ = za0004
			s += msgp.StringPrefixSize + len(za0003) + msgp.StringPrefixSize + len(za0004)
		}
	}
	s += 21 + msgp.StringPrefixSize + len(z.HistogramBucketLabel) + 10 + msgp.MapHeaderSize
	if z.Histogram != nil {
		for za0005, za0006 := range z.Histogram {
			_ = za0006
			s += msgp.StringPrefixSize + len(za0005) + msgp.Uint64Size
		}
	}
	return
}