* @return the hint about the source of the problem or an empty string if unknown, never {@code null}
     */
    @Nonnull
    String getSource();

    /**
     * Gets the one-based index of the line containing the problem. The line number should refer to some text file that
     * is given by {@link #getSource()}.
     *
     * @return the one-based index of the line containing the problem or a non-positive value if unknown
     */

                FileModelSource source = getSource(groupId, artifactId);
                if (source == null) {
                    // we need to check the whole reactor in case it's a dependency
                    loadFullReactor();
                    source = getSource(groupId, artifactId);
                }
                if (source != null) {

    peer.acceptFrame() // RST_STREAM
    peer.play()
    val connection = connect(peer)
    val stream1 = connection.newStream(headerEntries("b", "bark"), false)
    val source = stream1.getSource()
    val buffer = Buffer()
    while (buffer.size != 1024L) source.read(buffer, 1024)
    stream1.close(ErrorCode.CANCEL, null)
    val frame1 = peer.takeFrame()

                            md.getClassifier(),
                            edge.getArtifactUri(),
                            edge.getSource() == null
                                    ? ""
                                    : edge.getSource().getMd().toString(),
                            edge.isResolved(),
                            edge.getTarget() == null
                                    ? null

                    activeProfiles.add(profile);

                    if (Profile.SOURCE_POM.equals(profile.getSource())) {
                        activatedPomProfileNotByDefault = true;
                    }
                } else if (isActiveByDefault(profile)) {
                    if (Profile.SOURCE_POM.equals(profile.getSource())) {
                        activePomProfilesByDefault.add(profile);
                    } else {

// following test. Adding new code before this test or changing its
// position will cause the line number to change and the test to FAIL
// Tests getSource().
func TestGetSource(t *testing.T) {
	currentSource := func() string { return getSource(2) }
	gotSource := currentSource()
	// Hard coded line number, 35, in the "expectedSource" value
	expectedSource := "[namespace-lock_test.go:35:TestGetSource()]"

        if (!problem.getModelId().equals(projectId)) {
            buffer.append(problem.getModelId());

            if (!problem.getSource().isEmpty()) {
                if (buffer.length() > 0) {
                    buffer.append(", ");
                }
                buffer.append(problem.getSource());
            }
        }

        if (problem.getLineNumber() > 0) {
            if (buffer.length() > 0) {

 */
@Experimental
@Immutable
public interface ProjectBuilderRequest {

    @Nonnull
    Session getSession();

    @Nonnull
    Optional<Path> getPath();

    @Nonnull
    Optional<Source> getSource();

    boolean isAllowStubModel();

    boolean isRecursive();

    boolean isProcessPlugins();

    @Nullable
    List<RemoteRepository> getRepositories();

    @Nonnull

     *
     * @return The hint about the source of the problem or an empty string if unknown, never {@code null}.
     */
    String getSource();

    /**
     * Gets the one-based index of the line containing the problem. The line number should refer to some text file that
     * is given by {@link #getSource()}.
     *
     * @return The one-based index of the line containing the problem or a non-positive value if unknown.
     */

        assertEquals("", problem.getSource());

        problem = new DefaultProblem(null, null, "", -1, -1, null);
        assertEquals("", problem.getSource());

        problem = new DefaultProblem(null, null, "SOURCE", -1, -1, null);
        assertEquals("SOURCE", problem.getSource());
    }

    @Test
    void testGetLocation() {