def location = new ExternalResourceName(new URI("https://location/"))

    def "delegates list to delegate and generates build operation"() {
        setup:
        def items = ["a", "b"]
        expectListBuildOperation()

        when:
        def result = lister.list(location)

        then:
        result == items

            return model;
        } catch (XMLStreamException e) {
            Location location = e.getLocation();
            throw new ModelParseException(
                    e.getMessage(),
                    location != null ? location.getLineNumber() : -1,
                    location != null ? location.getColumnNumber() : -1,
                    e);
        } catch (Exception e) {

    private final Location location;

    /**
     * @param message the message for the exception
     * @param e the exception itself
     */
    public XmlReaderException(String message, Location location, Exception e) {
        super(message, e);
        this.location = location;
    }

    public Location getLocation() {
        return location;
    }

    def "uses caller's stack trace to calculate problem location"() {
        given:
        def location = Stub(Location)
        def stream = factory.newStream()

        when:
        def diagnostics = stream.forCurrentCaller()

        then:
        diagnostics.exception == null
        assertIsCallerStackTrace(diagnostics.stack)
        diagnostics.location == location

        when:
        def location = analyzer.locationForUsage(failure, false)

        then:
        location.sourceLongDisplayName == longDisplayName
        location.sourceShortDisplayName == shortDisplayName
        location.lineNumber == 7
        location.formatted == "<long source>: line 7"
    }

class PathSource implements ModelSource {

    private final Path path;
    private final String location;

    PathSource(Path path) {
        this(path, null);
    }

    PathSource(Path path, String location) {
        this.path = path;
        this.location = location != null ? location : path.toString();
    }

    @Override
    public Path getPath() {
        return path;
    }

            lock.unlock();
        }
    }

    @Nullable
    private Location locationFromStackRange(int startPos, int endPos, List<StackTraceElement> stack) {
        for (int i = startPos; i < endPos; i++) {
            Location location = tryGetLocation(stack.get(i));
            if (location != null) {
                return location;
            }
        }
        return null;
    }

    @Nullable

        private final List<StackTraceElement> stackTrace;
        private final Location location;
        private final UserCodeSource source;

        public DefaultProblemDiagnostics(
            @Nullable Failure stackTracingFailure,
            @Nullable Throwable exception,
            List<StackTraceElement> stackTrace,
            @Nullable Location location,
            @Nullable UserCodeSource source
        ) {

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    ```

 * or tasks. This property object keeps track of both the location and the task or tasks that produce the content of the element.
 *
 * <p><b>Note:</b> This interface is not intended for implementation by build script or plugin authors.</p>
 *
 * @param <T> The type of location.
 * @since 5.6
 */
@HasInternalProtocol