MojoNotFoundException, InvalidPluginDescriptorException {
        MojoDescriptor mojoDescriptor = execution.getMojoDescriptor();

        if (mojoDescriptor == null) {
            mojoDescriptor = pluginManager.getMojoDescriptor(
                    execution.getPlugin(),
                    execution.getGoal(),
                    project.getRemotePluginRepositories(),

        }
        if (mojoExecution.getMojoDescriptor().getDependencyCollectionRequired() != null) {
            writer.accept("\t\tDependencies (collect): "
                    + mojoExecution.getMojoDescriptor().getDependencyCollectionRequired());
        }
        if (mojoExecution.getMojoDescriptor().getDependencyResolutionRequired() != null) {

                "org.apache.maven.plugins",
                mojoExecution.getMojoDescriptor().getPluginDescriptor().getGroupId());
        assertEquals(
                "maven-resources-plugin",
                mojoExecution.getMojoDescriptor().getPluginDescriptor().getArtifactId());
        assertEquals(
                "0.1", mojoExecution.getMojoDescriptor().getPluginDescriptor().getVersion());
    }

    @Test

        for (ExecutionPlanItem executionPlanItem : planItem) {
            final MojoExecution mojoExecution = executionPlanItem.getMojoExecution();
            if (!mojoExecution.getMojoDescriptor().isThreadSafe()) {
                mojos.add(mojoExecution.getMojoDescriptor());
            }
        }
        return mojos;
    }

    // Used by m2e but will be removed, really.
    @Deprecated

                buildPlan.then(step);
            }

            return buildPlan;
        }

        private MojoDescriptor getMojoDescriptor(MavenProject project, Plugin plugin, String goal) {
            try {
                return mavenPluginManager.getMojoDescriptor(
                        plugin, goal, project.getRemotePluginRepositories(), session.getRepositorySession());
            } catch (MavenException e) {

                }
                buffer.append('\'').append(parameter.getName()).append('\'');
            }
        }
        return buffer.toString();
    }

    public MojoDescriptor getMojoDescriptor() {
        return mojo;
    }

    public List<Parameter> getParameters() {
        return parameters;
    }

    private static void decomposeParameterIntoUserInstructions(

    @Override
    public MojoDescriptor getMojoDescriptor(
            Plugin plugin, String goal, List<RemoteRepository> repositories, RepositorySystemSession session)
            throws PluginNotFoundException, PluginResolutionException, PluginDescriptorParsingException,
                    MojoNotFoundException, InvalidPluginDescriptorException {
        return mavenPluginManager.getMojoDescriptor(plugin, goal, repositories, session);
    }

    public PluginDescriptor loadPlugin(
            Plugin plugin, List<RemoteRepository> repositories, RepositorySystemSession session) {
        return null;
    }

    @Override
    public MojoDescriptor getMojoDescriptor(
            Plugin plugin, String goal, List<RemoteRepository> repositories, RepositorySystemSession session) {
        return MojoExecutorStub.createMojoDescriptor(plugin);
    }

    @Override

        Object result = new PluginParameterExpressionEvaluator(session, exec).evaluate("${plugin}");

        System.out.println("Result: " + result);

        assertSame(
                exec.getMojoDescriptor().getPluginDescriptor(),
                result,
                "${plugin} expression does not return plugin descriptor.");
    }

    @Test
    void testPluginArtifactsExpressionReference() throws Exception {

        for (MojoExecution mojoExecution : mojoExecutions) {
            MojoDescriptor mojoDescriptor = mojoExecution.getMojoDescriptor();

            scopesToResolve.addAll(toScopes(mojoDescriptor.getDependencyResolutionRequired()));

            scopesToCollect.addAll(toScopes(mojoDescriptor.getDependencyCollectionRequired()));
        }