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: messages.go
    path of file: ./repos/scan4all/vendor/github.com/golang-sql/sqlexp
    
    the code of the file until where you have to start completion: package sqlexp

import (
	"context"
	"fmt"
)

// RawMessage is returned from RowsMessage.
type RawMessage interface{}

// ReturnMessage ma
    
func ReturnMessageEnqueue(ctx context.Context, m *ReturnMessage, raw RawMessage) error {
	select {
	case <-ctx.Done():
		return ctx.Err()
	case m.queue <- raw:
		return nil
	}
}