[TYPO3] if translation of page exists

[Ralph Grier]

Hello List,

I have scoured the typo3 core api and I am not able to find the data
structure which would allow me to find out if the translation for a certain
pid is exists.  It must exists somewhere because if you manually try to go
to a page which has no translation you get the typo3 error message that the
page doesn't exist in the given language.  I need to be able to call this
function or query this data structure from my own userfunc.

Thank you in advance.
Ralph