import org.gradle.api.model.ObjectFactory;
import org.gradle.ide.xcode.XcodeExtension;

import javax.inject.Inject;

public class DefaultXcodeExtension implements XcodeExtension {
    private final DefaultXcodeProject project;

    @Inject
    public DefaultXcodeExtension(ObjectFactory objectFactory) {
        project = objectFactory.newInstance(DefaultXcodeProject.class);
    }

    @Override

package org.gradle.ide.xcode.internal;

import org.gradle.api.model.ObjectFactory;
import org.gradle.ide.xcode.XcodeRootExtension;

import javax.inject.Inject;

public class DefaultXcodeRootExtension extends DefaultXcodeExtension implements XcodeRootExtension {
    private final DefaultXcodeWorkspace workspace;

    @Inject
    public DefaultXcodeRootExtension(ObjectFactory objectFactory) {
        super(objectFactory);

            lifecycleTask.configure(dependsOn(workspaceTask));
            addWorkspace(xcode.getWorkspace());
        } else {
            DefaultXcodeExtension xcode = (DefaultXcodeExtension) project.getExtensions().create(XcodeExtension.class, "xcode", DefaultXcodeExtension.class, objectFactory);
            xcodeProject = xcode.getProject();
        }

Class <org.gradle.ide.xcode.internal.DefaultXcodeExtension> is not annotated (directly or via its package) with @org.gradle.api.NonNullApi in (DefaultXcodeExtension.java:0)
Class <org.gradle.ide.xcode.internal.DefaultXcodeProject$1> is not annotated (directly or via its package) with @org.gradle.api.NonNullApi in (DefaultXcodeProject.java:0)