assertNotNull(map, "No ManagedVersionMap");
        assertTrue(!map.isEmpty(), "ManagedVersionMap is empty");

        MavenProject clonedProject = projectToClone.clone();
        assertEquals("maven-core", clonedProject.getArtifactId());
        Map<?, ?> clonedMap = clonedProject.getManagedVersionMap();
        assertNotNull(clonedMap, "ManagedVersionMap not copied");

                        extensionArtifacts.add(artifact);
                    }
                }
            }
            project.setExtensionArtifacts(extensionArtifacts);

            // managedVersionMap
            Map<String, Artifact> map = Collections.emptyMap();
            final DependencyManagement dependencyManagement =
                    project.getModel().getDelegate().getDependencyManagement();