@Test
void checkSimplePrmMutability() {

    OTPatternRefinementModel refinementModel = generatePrmWithoutPermutationMaps();
    PermutationGenerator permutationGenerator = new PermutationGenerator();
    assertTrue(permutationGenerator.checkMutability(refinementModel));
    assertEquals(6, refinementModel.getPermutationOptions().size());
    assertEquals(7, refinementModel.getPermutationMappings().size());
}