function __TS__StringPadStart(self, maxLength, fillString)
    if fillString == nil then
        fillString = " "
    end
    if maxLength ~= maxLength then
        maxLength = 0
    end
    if (maxLength == -math.huge) or (maxLength == math.huge) then
        error("Invalid string length", 0)
    end
    if (#self >= maxLength) or (#fillString == 0) then
        return self
    end
    maxLength = maxLength - #self
    if maxLength > #fillString then
        fillString = tostring(fillString) .. tostring(
            string.rep(
                fillString,
                math.floor(maxLength / #fillString)
            )
        )
    end
    return tostring(
        string.sub(
            fillString,
            1,
            math.floor(maxLength)
        )
    ) .. tostring(self)
end