//
        // Maven4: We may want to evaluate how this is used but we add these separate as the
        // getExecutionProperties is deprecated in MavenSession.
        //
        this.properties.putAll(session.getUserProperties());
        this.properties.putAll(session.getSystemProperties());

        String basedir = null;

        if (project != null) {
            File projectFile = project.getBasedir();

                // properties in dependencies the user does not know. See MNG-7563 for details.
                modelRequest.setSystemProperties(
                        toProperties(session.getUserProperties(), session.getSystemProperties()));
                modelRequest.setUserProperties(new Properties());
                modelRequest.setModelCache(modelCacheFactory.createCache(session));

     * configured directly by the user on his discretion, e.g. via the {@code -Dkey=value} parameter on the command
     * line.
     *
     * @return The user properties, never {@code null}.
     */
    Properties getUserProperties();

    /**
     * Sets the user properties to use for interpolation and profile activation. The user properties have been

        request.session(iSession);
        request.source(src);
        request.locationTracking(false);
        request.systemProperties(session.getSystemProperties());
        request.userProperties(session.getUserProperties());
        request.lifecycleBindingsInjector(lifecycleBindingsInjector::injectLifecycleBindings);
        ModelBuilder.ModelBuilderSession mbSession =

                    if (session != null) {
                        configuration.setSystemProperties(session.getSystemProperties());
                        configuration.setUserProperties(session.getUserProperties());
                    } else {
                        configuration.setSystemProperties(getSystemProperties());
                        configuration.setUserProperties(new Properties());
                    }

     * configured directly by the user on his discretion, e.g. via the {@code -Dkey=value} parameter on the command
     * line.
     *
     * @return The user properties, never {@code null}.
     */
    Properties getUserProperties();

    // Reactor
    MavenExecutionRequest setReactorFailureBehavior(String failureBehavior);

    String getReactorFailureBehavior();

    /**

        MavenProject mp = projectBuilder.build(f1, request).getProject();
        assertEquals("0.1.0-DEVELOPER", mp.getVersion());

        session.getUserProperties().put("release", "true");
        mp = projectBuilder.build(f1, request).getProject();
        assertEquals("0.1.0", mp.getVersion());
    }

    @Test

            modelBuildingRequest.systemProperties(toMap(request.getSystemProperties()));
            modelBuildingRequest.userProperties(toMap(request.getUserProperties()));
            modelBuildingRequest.repositoryMerging(ModelBuilderRequest.RepositoryMerging.valueOf(
                    request.getRepositoryMerging().name()));