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: arn_member.go
    path of file: ./repos/aws-sdk-go-v2/service/internal/s3shared/arn
    
    the code of the file until where you have to start completion: package arn

import "fmt"

// arnable is implemented by the relevant S3/S3Control
// 
    
func SetARNField(input interface{}, v string) error {
	params, ok := input.(arnable)
	if !ok {
		return fmt.Errorf("Params does not contain arn field member")
	}
	return params.SetARNMember(v)
}