code: public static Outcome create(final Status status, final URI invocationID,
              @Nullable final URI objectID) {
          return create(status, invocationID, objectID, null);
      }
docs: Creates a new {@code Outcome} with the status code, invocation ID and optional object ID
  supplied.
  
  @param status
  the status code, not null
  @param invocationID
  the invocation ID, not null
  @param objectID
  the optional object ID, possibly null
  @return the created {@code Outcome}