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: tables9.0.0.go
    path of file: ./repos/teller/vendor/golang.org/x/text/width
    
    the code of the file until where you have to start completion: // Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT.

//go:build !go1.10
// +build !go1.10

package width

// UnicodeVersion is the Unicode version from which the tables in this package are d
    
func (t *widthTrie) lookupUnsafe(s []byte) uint16 {
	c0 := s[0]
	if c0 < 0x80 { // is ASCII
		return widthValues[c0]
	}
	i := widthIndex[c0]
	if c0 < 0xE0 { // 2-byte UTF-8
		return t.lookupValue(uint32(i), s[1])
	}
	i = widthIndex[uint32(i)<<6+uint32(s[1])]
	if c0 < 0xF0 { // 3-byte UTF-8
		return t.lookupValue(uint32(i), s[2])
	}
	i = widthIndex[uint32(i)<<6+uint32(s[2])]
	if c0 < 0xF8 { // 4-byte UTF-8
		return t.lookupValue(uint32(i), s[3])
	}
	return 0
}