get-language-numbers in drscheme:language:language<%>
This method is used in a manner analogous to
get-language-position.
Each element in the list indicates how the names at that
point in dialog will be sorted. Names with lower numbers
appear first. If two languages are added to DrScheme with
the same strings (as given by the
get-language-position method) the corresponding numbers returned by this method
must be the same.