@Nonnull
    @Override
    MessageBuilder append(char c);

    /**
     * Append content to the message buffer.
     *
     * @param value the content to append
     * @param offset the index of the first {@code char} to append
     * @param len the number of {@code char}s to append
     * @return the current builder
     */
    @Nonnull
    default MessageBuilder a(char[] value, int offset, int len) {

     *
     * @param message The detail message, may be {@code null}.
     * @param groupId The group id of the unresolvable model, may be {@code null}.
     * @param artifactId The artifact id of the unresolvable model, may be {@code null}.
     * @param version The version of the unresolvable model, may be {@code null}.
     * @param cause The cause, may be {@code null}.
     */

        return parameters;
    }

    private static void decomposeParameterIntoUserInstructions(
            MojoDescriptor mojo, Parameter param, StringBuilder messageBuffer) {
        String expression = param.getExpression();

        if (param.isEditable()) {
            boolean isArray = param.getType().endsWith("[]");
            boolean isCollection = false;
            boolean isMap = false;
            boolean isProperties = false;

     * file and has not been subjected to inheritance, interpolation or profile/default injection.
     *
     * @param model The model to validate, must not be {@code null}.
     * @param request The model building request that holds further settings, must not be {@code null}.
     * @param problems The container used to collect problems that were encountered, must not be {@code null}.
     */

    public InvalidProjectModelException(String projectId, String message, File pomLocation) {
        super(projectId, message, pomLocation);
    }

    /**
     * @param projectId
     * @param pomLocation      absolute path of the pom file
     * @param message
     * @param validationResult
     * @deprecated use {@link File} constructor for pomLocation
     */
    @Deprecated
    public InvalidProjectModelException(

     * Resolves the runtime dependencies of the specified plugin.
     *
     * @param plugin The plugin for which to resolve the dependencies, must not be {@code null}.
     * @param pluginArtifact The plugin's main artifact, may be {@code null}.
     * @param dependencyFilter A filter to exclude artifacts from resolution (but not collection), may be {@code null}.

    /**
     * Creates a new result with the specified contents.
     *
     * @param project The project that was built, may be {@code null}.
     * @param problems The problems that were encountered, may be {@code null}.
     * @param dependencyResolutionResult The result of the resolution for the project dependencies, may be {@code null}.
     */
    DefaultProjectBuildingResult(

     * @param request The execution request that will be enriched.
     * @param rootProject The root project that is being built.
     */
    void applyResumptionData(MavenExecutionRequest request, MavenProject rootProject);

    /**
     * Removes previously stored resumption data.
     * @param rootProject The root project that is being built.
     */

    @Nonnull
    Collection<ChecksumAlgorithm> select(@Nonnull Collection<String> algorithmNames);

    /**
     * Calculates checksums for specified data.
     *
     * @param data        The content for which to calculate checksums, must not be {@code null}.
     * @param algorithms  The checksum algorithms to use, must not be {@code null}.
     * @return The calculated checksums, indexed by algorithms, never {@code null}.

    private Artifact artifact;

    /**
     * @param message a message
     * @deprecated use {@link #ArtifactMetadataRetrievalException(String, Throwable, Artifact)}
     */
    @Deprecated
    public ArtifactMetadataRetrievalException(String message) {
        this(message, null, null);
    }

    /**
     * @param cause a cause