string.isutf8 = ustring.isutf8
string.byteoffset = ustring.byteoffset
string.codepoint = ustring.codepoint
string.gcodepoint = ustring.gcodepoint
string.toNFC = ustring.toNFC
string.toNFD = ustring.toNFD
string.uchar = ustring.char
string.ulen = ustring.len
string.usub = ustring.sub
string.uupper = ustring.upper
string.ulower = ustring.lower
string.ufind = ustring.find
string.umatch = ustring.match
string.ugmatch = ustring.gmatch
string.ugsub = ustring.gsub