DefaultProblemCollector collector = new DefaultProblemCollector(null);

        collector.add(null, "PROBLEM1", -1, -1, null);

        collector.setSource("SOURCE_PROBLEM2");
        collector.add(null, "PROBLEM2", -1, -1, null);

        collector.setSource("SOURCE_PROBLEM3");
        collector.add(null, "PROBLEM3", -1, -1, null);

        assertEquals("", collector.getProblems().get(0).getSource());

            InputLocation location,
            Exception exception);

    void add(ModelProblem problem);

    ModelBuilderException newModelBuilderException();

    void setSource(String location);

    void setSource(Model model);

    String getSource();

    void setRootModel(Model model);

    Model getRootModel();

                logger.warn("{} is not found.", mappingFile, e);
            }
            try {
                final AcknowledgedResponse putMappingResponse = indicesClient.preparePutMapping(index).setSource(source, XContentType.JSON)
                        .execute().actionGet(fessConfig.getIndexIndicesTimeout());
                if (putMappingResponse.isAcknowledged()) {

                        .setSource(item.getUpdatedSource(getResponse.getSourceAsMap()));
                bulkRequestBuilder.add(indexRequestBuilder);
            } else {
                final IndexRequestBuilder indexRequestBuilder = new IndexRequestBuilder(client, IndexAction.INSTANCE, index);
                indexRequestBuilder.setId(item.getId()).setOpType(IndexRequest.OpType.INDEX).setSource(item.getSource());

                return Collections.emptyList();
            }
        };
        ComponentUtil.register(requestHeaderService, RequestHeaderService.class.getCanonicalName());

        final SetOnce<Map<String, Object>> initParamMapSet = new SetOnce<>();
        WebConfig webConfig = new WebConfig();
        webConfig.setUserAgent(Constants.CRAWLING_USER_AGENT_PREFIX + "1.0" + Constants.CRAWLING_USER_AGENT_SUFFIX);

                e.getMessage());
    }

    @Test
    void testUnknownPosition() {
        ProblemCollector problemCollector = ProblemCollectorFactory.newInstance(null);
        problemCollector.setSource("SOURCE");
        problemCollector.add(Problem.Severity.ERROR, "MESSAGE", -1, -1, new Exception());
        ToolchainsBuildingException e = new ToolchainsBuildingException(problemCollector.getProblems());
        assertEquals(

     * their source, but the next messages will use the new source.
     *
     * @param source a source
     */
    void setSource(String source);

    /**
     *
     * @return the collected Problems, never {@code null}
     */
    List<Problem> getProblems();

    }

    @Override
    public List<ModelProblem> getProblems() {
        return problems;
    }

    public void setSource(String source) {
        this.source = source;
        this.sourceModel = null;
    }

    public void setSource(Model source) {
        this.sourceModel = source;
        this.source = null;

        if (rootModel == null) {
            rootModel = source;

        this.problems = (problems != null) ? problems : new ArrayList<>();
    }

    public List<SettingsProblem> getProblems() {
        return problems;
    }

    public void setSource(String source) {
        this.source = source;
    }

    @Override
    public void add(SettingsProblem.Severity severity, String message, int line, int column, Exception cause) {

        this.problems = (problems != null) ? problems : new ArrayList<>();
    }

    @Override
    public List<Problem> getProblems() {
        return problems;
    }

    @Override
    public void setSource(String source) {
        this.source = source;
    }

    @Override
    public void add(Problem.Severity severity, String message, int line, int column, Exception cause) {