buildDiscarder(logRotator(numToKeepStr: '20', artifactNumToKeepStr: '5'))
    timeout(time: 180, unit: 'MINUTES')
  }
  parameters {
    string( defaultValue: 'master', description: 'Core Its branch (default master)',
            name: 'ITS_BRANCH' )
  }
  stages {
    stage("Build Maven Core") {
      steps {
        withEnv(["JAVA_HOME=${ tool "JDK 1.8 (latest)" }", "PATH+MAVEN=${tool 'Maven 3.6.3'}/bin:${env.JAVA_HOME}/bin"]) {

main channel of communication for contributors.  
There are some guidelines which will make applying PRs easier for us:
+ Create a topic branch from where you want to base your work (this is usually the master branch).
  Push your changes to a topic branch in your fork of the repository.
+ Make commits of logical units.
+ Respect the original code style: by using the same [codestyle][code-style],

        if (!recessivePlugins.isEmpty() || !plugins.isEmpty()) {
            LinkedHashMap<String, Plugin> mergedPlugins = new LinkedHashMap<>();
            recessivePlugins.forEach(p -> mergedPlugins.put(p.getPrefix(), p));
            plugins.forEach(p -> mergedPlugins.put(p.getPrefix(), p));
            metadata = metadata.withPlugins(mergedPlugins.values());
        }
        // just carry-on as-is

                                "org.apache.maven.shared" ] )
#set ( $MITLicenseNames = [ "MIT License", "MIT license", "The MIT License" ] )
#foreach ( $project in $projects )
#**##foreach ( $license in $project.licenses )
#*  *##set ( $groupId = $project.artifact.groupId )
#*  *##set ( $directory = 'lib' )
#*  *##if ( !$apacheMavenGroupIds.contains( $groupId ) )

                        List<Object> l = containerProvider
                                .get()
                                .lookupList(key.getTypeParameter(0).getRawType());
                        l.forEach(o -> res3.add(new Binding.BindingToInstance<>(o)));
                    } catch (Throwable e) {
                        // ignore
                        e.printStackTrace();
                    }

                        && !"clean".equals(getLifecycles(project).peekLast())
                || hasBeenPackagedDuringThisSession(project)) {
            getProjectArtifacts(project).filter(this::isRegularFile).forEach(this::installIntoProjectLocalRepository);
        }
    }

    private void cleanProjectLocalRepository(MavenProject project) {
        try {
            Path artifactPath = getProjectLocalRepo()

            return;
        }

        mojoDescriptor.getParameters().stream()
                .filter(this::isDeprecated)
                .map(this::formatParameter)
                .forEach(m -> pluginValidationManager.reportPluginMojoValidationIssue(
                        PluginValidationManager.IssueLocality.EXTERNAL, mavenSession, mojoDescriptor, mojoClass, m));
    }

    @Override
    public void checkPrerequisites(PluginDescriptor pluginDescriptor) throws PluginIncompatibleException {
        List<IllegalStateException> prerequisiteExceptions = new ArrayList<>();
        prerequisitesCheckers.forEach(c -> {
            try {
                c.accept(pluginDescriptor);
            } catch (IllegalStateException e) {
                prerequisiteExceptions.add(e);
            }
        });

        List<MetadataGeneratorFactory> factories = plexusContainer.lookupList(MetadataGeneratorFactory.class);
        assertNotNull(factories);
        factories.forEach(f -> System.out.println(f.getClass().getName()));
        assertEquals(3, factories.size());
    }

    @Test
    void testProjectDependencies() {

                importResult = build(importRequest, importIds);
            } catch (ModelBuilderException e) {
                e.getResult().getProblems().forEach(problems::add);
                return null;
            }

            importResult.getProblems().forEach(problems::add);

            importModel = importResult.getEffectiveModel();
        }

        return importModel;
    }