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function export.stage_at_split(a, b) | function export.stage_at_split(a, b) | ||
return #export.get_common_ancestors(a, b) | return #export.get_common_ancestors(a, b) | ||
end -- returns stage at which the two languages | end -- returns stage at which the two languages diverged as an integer; if not related, returns 0 | ||
function export.common_ancestor(a, b) | function export.common_ancestor(a, b) |