put
Set the given co-domain value for a given domain key. Overwrites existing values in domain and co-domain.
Return
Pair of overwritten pairs. First element is the pair that was overwritten in the domain (or null), second element is the pair that was overwritten in the co-domain (or null).
Parameters
key
Key (from the domain) to set the value for.
value
Value (from the co-domain) to set for given domain key.