*/
    @Nonnull
    static <P extends BuilderProblem> ProblemCollector<P> create(int maxCountLimit) {
        return create(maxCountLimit, p -> true);
    }

    /**
     * Default implementation of the ProblemCollector interface.
     *
     * @param <P> the type of problem
     */
    class Impl<P extends BuilderProblem> implements ProblemCollector<P> {

        private final int maxCountLimit;

class ProblemCollectorFactoryTest {

    @Test
    void testNewInstance() {
        ProblemCollector collector1 = ProblemCollectorFactory.newInstance(null);

        Problem problem = new DefaultProblem("MESSAGE1", null, null, -1, -1, null);
        ProblemCollector collector2 = ProblemCollectorFactory.newInstance(Collections.singletonList(problem));

        assertNotSame(collector1, collector2);