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: tables15.0.0.go
    path of file: ./repos/gotosocial/vendor/golang.org/x/net/idna
    
    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 go1.21

package idna

// UnicodeVersion is the Unicode version from which the tables in this package are derived.
const UnicodeVersion = "15.0.0"

var mappings string = "" + // Size: 6704 bytes
	"  ̈a ̄23 ́ ̧1o1⁄41⁄23⁄4i̇l·ʼnsdžⱥⱦhjrwy ̆ ̇ 
    
func (t *idnaTrie) lookupUnsafe(s []byte) uint16 {
	c0 := s[0]
	if c0 < 0x80 { // is ASCII
		return idnaValues[c0]
	}
	i := idnaIndex[c0]
	if c0 < 0xE0 { // 2-byte UTF-8
		return t.lookupValue(uint32(i), s[1])
	}
	i = idnaIndex[uint32(i)<<6+uint32(s[1])]
	if c0 < 0xF0 { // 3-byte UTF-8
		return t.lookupValue(uint32(i), s[2])
	}
	i = idnaIndex[uint32(i)<<6+uint32(s[2])]
	if c0 < 0xF8 { // 4-byte UTF-8
		return t.lookupValue(uint32(i), s[3])
	}
	return 0
}