LUA Halp with code removed in 9.x.x

[Dave B]

Hi,

I'm having some trouble tracking down what code was changed to to try and fix an addon, the removed code was from this subset

Frame:GetBackdrop
Frame:GetBackdropBorderColor
Frame:GetBackdropColor
Frame:SetBackdrop
Frame:SetBackdropBorderColor
Frame:SetBackdropColor

The code in the addon (YSSDROP, for reference) is

frame:SetBackdrop(GameTooltip:GetBackdrop())
frame:SetBackdropBorderColor(GameTooltip:GetBackdropBorderColor())
frame:SetBackdropColor(GameTooltip:GetBackdropColor())
frame:SetScale(GameTooltip:GetScale())

my question is: what do I need to change it to to get it working? I've tried the option of NineSlice and that didn't help, there's scant information on what the set/getbackdrop code was changed to, any experts that can shed some light?

TYIA