validate20RawPlugins(problems, build.getPlugins(), "build.plugins.plugin.", EMPTY, request);

                PluginManagement mgmt = build.getPluginManagement();
                if (mgmt != null) {
                    validate20RawPlugins(
                            problems, mgmt.getPlugins(), "build.pluginManagement.plugins.plugin.", EMPTY, request);
                }
            }

import org.apache.maven.model.InputSource;
import org.apache.maven.model.Model;
import org.apache.maven.model.Parent;
import org.apache.maven.model.Plugin;
import org.apache.maven.model.PluginManagement;
import org.apache.maven.model.Profile;
import org.apache.maven.model.Repository;
import org.apache.maven.model.building.ModelProblem.Severity;
import org.apache.maven.model.building.ModelProblem.Version;

    }

    /* MNG-3567*/
    @Test
    void testPluginManagementInherited() throws Exception {
        PomTestWrapper pom = buildPom("pluginmanagement-inherited/sub");
        assertEquals("1.0-alpha-21", pom.getValue("build/plugins[1]/version"));
    }

    /* MNG-2174*/
    @Test
    void testPluginManagementDependencies() throws Exception {

            return getModel().getDelegate().getSubprojects();
        }
        return getModel().getModules();
    }

    public PluginManagement getPluginManagement() {
        PluginManagement pluginMgmt = null;

        Build build = getModel().getBuild();
        if (build != null) {
            pluginMgmt = build.getPluginManagement();
        }

            if (!unversionedPlugins.isEmpty()) {
                logger.warn("Version not locked for default bindings plugins " + unversionedPlugins
                        + ", you should define versions in pluginManagement section of your " + "pom.xml or parent");
            }
        }

        private void checkThreadSafety(BuildPlan buildPlan) {
            if (threads > 1) {