mavenExecutionRequest.setExecutionListener(new AbstractExecutionListener());
        mavenExecutionRequest.setGoals(Arrays.asList("clean", "aggr", "install"));
        mavenExecutionRequest.setDegreeOfConcurrency(1);
        final MavenSession session = new MavenSession(null, null, mavenExecutionRequest, defaultMavenExecutionResult);
        final ProjectDependencyGraphStub dependencyGraphStub = new ProjectDependencyGraphStub();

    String getMakeBehavior();

    /**
     * Set's the parallel degree of concurrency used by the build.
     *
     * @param degreeOfConcurrency
     */
    void setDegreeOfConcurrency(int degreeOfConcurrency);

    /**
     * @return the degree of concurrency for the build.
     */
    int getDegreeOfConcurrency();

    // Recursive (really to just process the top-level POM)

        this.executionListener = executionListener;

        return this;
    }

    @Override
    public void setDegreeOfConcurrency(final int degreeOfConcurrency) {
        this.degreeOfConcurrency = degreeOfConcurrency;
    }

    @Override
    public int getDegreeOfConcurrency() {
        return degreeOfConcurrency;
    }

            int degreeOfConcurrency = calculateDegreeOfConcurrency(threadConfiguration);
            if (degreeOfConcurrency > 1) {
                request.setBuilderId("multithreaded");
                request.setDegreeOfConcurrency(degreeOfConcurrency);
            }
        }

        //
        // Allow the builder to be overridden by the user if requested. The builders are now pluggable.
        //