Don't add tokens due to re-declaration
Production rules may redeclare parts of their ancestors children, e.g. to sort them differently.
Currently, those parts are add "again" to affected classes.
A ::= <Name> <Number:int> MyC:C ; B : A ::= <Number:int> <Name> MyC:C <Value:float> ; C ;
B should have the tokens
Number only once. The child
MyC must also not be copied.