.input2(invariantInput)
.name(JOIN_WITH_INVARIANT_NAME)
.build();
JoinOperator joinWithSolutionSet = JoinOperator.builder(
joinPreservesSolutionSet ? new DummyMatchStub() : new DummyNonPreservingMatchStub(), LongValue.class, 0, 0)
.input1(iteration.getSolutionSet())
.input2(joinWithInvariant)
.name(JOIN_WITH_SOLUTION_SET)
.build();