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: utfbom.go
    path of file: ./repos/ko/vendor/github.com/dimchansky/utfbom
    
    the code of the file until where you have to start completion: // Package utfbom implements the detection of the BOM (Unicode Byte Order Mark) and removing as necessary.
// It wraps an io.Reader object, creating another object (Reader) that also implemen
    
func Skip(rd io.Reader) (*Reader, Encoding) {
	// Is it already a Reader?
	b, ok := rd.(*Reader)
	if ok {
		return b, Unknown
	}

	enc, left, err := detectUtf(rd)
	return &Reader{
		rd:  rd,
		buf: left,
		err: err,
	}, enc
}