def storage_pair(key)
      field = key.to_s
      name = aliases[field] || field
      [ name, serializers[name] ]
    end
def storage_pair(key)
      field = key.to_s
      name = aliases[field] || field
      [ name, serializers[name] ]
    end
Get the pair of objects needed to store the value in a hash by the
 provided key. This is the database field name and the serializer.

 @api private

 @example Get the name and serializer.
   smash.storage_pair("id")

 @param [ Symbol, String ] key The key provided to the selection.

 @return [ Array<String, Object> ] The name of the db field and
   serializer.

 @since 1.0.0