with Arg1
  Creates a new Args4 by coping this Args4 but replaces the argument 1 (Args4.a1) with the given value (and its representation with the given representation).
Return
The newly created Args4.
Since
1.0.0
Parameters
value
the new value to use for argument 1.
representation
the new representation to use for the argument 1 where null     means let the algorithm determine a representation.