on isXtraInstalled xtraName
if not stringP(xtraName) then
-- alert "isXtraInstalled requires an Xtra name to work".
return false
end if
repeat with i = 1 to the number of xtras
if the name of xtra i = xtraName then return true
end repeat
return false
end
if not stringP(xtraName) then
-- alert "isXtraInstalled requires an Xtra name to work".
return false
end if
repeat with i = 1 to the number of xtras
if the name of xtra i = xtraName then return true
end repeat
return false
end
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