[JENKINS-43507] Prevent java.lang.AbstractMethodError when used as a …

…test dependency against older Jenkins

src/main/java/jenkins/branch/ProjectNameProperty.java

@@ -28,6 +28,7 @@
import com.cloudbees.hudson.plugins.folder.AbstractFolder;
import com.cloudbees.hudson.plugins.folder.AbstractFolderProperty;
import com.cloudbees.hudson.plugins.folder.AbstractFolderPropertyDescriptor;
import edu.umd.cs.findbugs.annotations.NonNull;
import hudson.Extension;
import hudson.model.Descriptor;
import jenkins.scm.api.SCMNavigator;
@@ -48,7 +49,7 @@
 *
 * @since 2.0.0
 */
public class ProjectNameProperty extends AbstractFolderProperty<MultiBranchProject<?,?>> {
public class ProjectNameProperty extends AbstractFolderProperty<MultiBranchProject<?, ?>> {

    private final String name;

@@ -67,6 +68,12 @@ public String getName() {

    @Extension
    public static class DescriptorImpl extends AbstractFolderPropertyDescriptor {
        @NonNull
        @Override
        public String getDisplayName() {
            return "Project name";
        }

        @Override
        public boolean isApplicable(Class<? extends AbstractFolder> containerType) {
            return MultiBranchProject.class.isAssignableFrom(containerType);