local __TS__StringReplace
do
    local sub = string.sub
    function __TS__StringReplace(source, searchValue, replaceValue)
        local startPos, endPos = string.find(source, searchValue, nil, true)
        if not startPos then
            return source
        end
        local before = sub(source, 1, startPos - 1)
        local replacement = type(replaceValue) == "string" and replaceValue or replaceValue(nil, searchValue, startPos - 1, source)
        local after = sub(source, endPos + 1)
        return (before .. replacement) .. after
    end
end