Helo have wrong code in documentation.
local firstBp = getcontainer(0)
while firstBp.hashigher do
higherwindows('0')
end
higherwindows() have an while incorporate, if you put an while when you need to only higher one window then will higer all windows.
local firstBp = getcontainer(0)
if firstBp.hashigher then
higherwindows('0')
end