lua.wetgenes.lookup
value = wetgenes.lookup(table,...)
Safe recursive lookup within a table that returns nil if any part of the lookup is nil so we never cause an error but just return nil. This is intended to replace the following sort of code
a = b and b.c and b.c.d and b.c.d.e
To get e only if all of its parent bits exist and not to cause any error if they do not. instead use
a = lookup(b,"c","d","e")