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: override.go
    path of file: ./repos/hoverfly/vendor/golang.org/x/text/encoding/unicode
    
    the code of the file until where you have to start completion: // Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package unicode

import (
	"golang.org/x/text/transform
    
func BOMOverride(fallback transform.Transformer) transform.Transformer {
	// TODO: possibly allow a variadic argument of unicode encodings to allow
	// specifying details of which fallbacks are supported as well as
	// specifying the details of the implementations. This would also allow for
	// support for UTF-32, which should not be supported by default.
	return &bomOverride{fallback: fallback}
}