Path getPath();

    /**
     * Creates a new byte stream to the source contents.
     * Closing the returned stream is the responsibility of the caller.
     *
     * @return a byte stream to the source contents, never {@code null}
     * @throws IOException in case of IO issue
     */
    @Nonnull
    InputStream openStream() throws IOException;

    /**
     * Provides a user-friendly hint about the location of the source.

     *
     * @param request The request that holds the details about the plugin and the repositories to consult, must not be
     *            {@code null}.
     * @return The result of the prefix resolution, never {@code null}.
     * @throws NoPluginFoundForPrefixException If the plugin prefix could not be resolved.
     */
    PluginPrefixResult resolve(PluginPrefixRequest request) throws NoPluginFoundForPrefixException;

        this.lifecycleId = (lifecycleId != null) ? lifecycleId : "";
    }

    /**
     * Gets the identifier of the lifecycle that was not found.
     *
     * @return The identifier of the lifecycle that was not found, never {@code null}.
     */
    public String getLifecycleId() {
        return lifecycleId;
    }

        super(parent);
        this.attrib = attrib;
    }

    @Override
    public int compareChildNodePointers(NodePointer pointer1, NodePointer pointer2) {
        // should never happen because attributes have no children
        return 0;
    }

    @Override
    public Object getValue() {
        return attrib.getValue();
    }

    @Override
    public Object getBaseValue() {

     *
     * @param request the toolchains building request that holds the parameters, must not be {@code null}
     * @return the result of the toolchains building, never {@code null}
     * @throws ToolchainsBuilderException if the effective toolchains could not be built
     */
    ToolchainsBuilderResult build(ToolchainsBuilderRequest request);

    /**

     * @param problems The container used to collect problems that were encountered, must not be {@code null}.
     * @return The interpolated model, never {@code null}.
     * @since 4.0.0
     */
    Model interpolateModel(Model model, Path projectDir, ModelBuilderRequest request, ModelProblemCollector problems);

     * Gets the policy that applies to this metadata regarding the specified repository.
     *
     * @param repository The repository for which to determine the policy, must not be {@code null}.
     * @return The policy, never {@code null}.
     */
    ArtifactRepositoryPolicy getPolicy(ArtifactRepository repository);

            return this.keys.hashCode();
        }
    }

    /**
     * chains a collection of {@link WorkspaceReader}s
     * @param workspaceReaderCollection the collection of readers, might be empty but never <code>null</code>
     * @return if the collection contains only one item returns the single item, otherwise creates a new
     *         {@link MavenChainedWorkspaceReader} chaining all readers in the order of the given collection.

        this.modelXmlFactory = modelXmlFactory;
        this.modelParsers = modelParsers;
    }

    @Override
    public Path locateExistingPom(Path projectDirectory) {
        // Note that the ModelProcessor#locatePom never returns null
        // while the ModelParser#locatePom needs to return an existing path!
        Path pom = modelParsers.stream()
                .map(m -> m.locate(projectDirectory)

 *
 * The root locator is usually looked up from the plexus container.
 * One notable exception is the computation of the early {@code session.rootDirectory}
 * property which happens very early.  The implementation used in this case
 * will be discovered using the JDK service mechanism.
 *
 * The default implementation will look for a {@code .mvn} child directory