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: metadata_update.go
    path of file: ./repos/client/go/protocol/keybase1
    
    the code of the file until where you have to start completion: // Auto-generated to Go types and interfaces using avdl-compiler v1.4.10 (https://github.com/keybase/node-avdl-compiler)
//   Input file: avdl/keybase1/metadata_update.avdl

package keybase1

import (
	"github.com/keybase/go-framed-msgpack-rpc/rpc"
	context "golang.org/x/net/context"
	"time"
)

type RekeyRequest struct {
	FolderID string `codec:"folderID" json:"folderID"`
	Revision int64  `codec:"revision" json:"revision"`
}

func (o RekeyRequest) DeepCopy() RekeyRequest {
	return RekeyRequest{
		FolderID: o.FolderID,
		Revision: o.Revision,
	}
}

type MetadataUpdateArg struct {
	FolderID string `codec:"folderID" json:"folderID"`
	Revision int64  `codec:"revision" json:"revision"`
}

type FolderNeedsRekeyArg struct {
	FolderID string `codec:"folderID" json:"folderID"`
	Revision int64  `codec:"revision" json:"revision"`
}

type FoldersNeedRekeyArg struc
    
func MetadataUpdateProtocol(i MetadataUpdateInterface) rpc.Protocol {
	return rpc.Protocol{
		Name: "keybase.1.metadataUpdate",
		Methods: map[string]rpc.ServeHandlerDescription{
			"metadataUpdate": {
				MakeArg: func() interface{} {
					var ret [1]MetadataUpdateArg
					return &ret
				},
				Handler: func(ctx context.Context, args interface{}) (ret interface{}, err error) {
					typedArgs, ok := args.(*[1]MetadataUpdateArg)
					if !ok {
						err = rpc.NewTypeError((*[1]MetadataUpdateArg)(nil), args)
						return
					}
					err = i.MetadataUpdate(ctx, typedArgs[0])
					return
				},
			},
			"folderNeedsRekey": {
				MakeArg: func() interface{} {
					var ret [1]FolderNeedsRekeyArg
					return &ret
				},
				Handler: func(ctx context.Context, args interface{}) (ret interface{}, err error) {
					typedArgs, ok := args.(*[1]FolderNeedsRekeyArg)
					if !ok {
						err = rpc.NewTypeError((*[1]FolderNeedsRekeyArg)(nil), args)
						return
					}
					err = i.FolderNeedsRekey(ctx, typedArgs[0])
					return
				},
			},
			"foldersNeedRekey": {
				MakeArg: func() interface{} {
					var ret [1]FoldersNeedRekeyArg
					return &ret
				},
				Handler: func(ctx context.Context, args interface{}) (ret interface{}, err error) {
					typedArgs, ok := args.(*[1]FoldersNeedRekeyArg)
					if !ok {
						err = rpc.NewTypeError((*[1]FoldersNeedRekeyArg)(nil), args)
						return
					}
					err = i.FoldersNeedRekey(ctx, typedArgs[0].Requests)
					return
				},
			},
		},
	}
}