import java.util.ArrayList;
import java.util.List;

/**
 * Superclass of build phases. Each build phase represents one step in building a target.
 */
public abstract class PBXBuildPhase extends PBXProjectItem {
    private final List<PBXBuildFile> files;

    public PBXBuildPhase() {
        this.files = new ArrayList<>();
    }

    public List<PBXBuildFile> getFiles() {
        return files;
    }

    @Override

 */
public abstract class PBXTarget extends PBXProjectItem {
    private final String name;
    private final ProductType productType;
    private final List<PBXBuildPhase> buildPhases;
    private final XCConfigurationList buildConfigurationList;
    @Nullable
    private String productName;
    @Nullable
    private PBXFileReference productReference;

/**
 * Lists the files to be compiled for the containing {@link PBXTarget}.
 *
 * A target should contain at most one of this build phase.
 */
public class PBXSourcesBuildPhase extends PBXBuildPhase {
    @Override
    public String isa() {
        return "PBXSourcesBuildPhase";
    }

import javax.annotation.Nullable;
import java.util.ArrayList;
import java.util.List;

/**
 * Build phase which represents running a shell script.
 */
public class PBXShellScriptBuildPhase extends PBXBuildPhase {
    private List<String> inputPaths;
    private List<String> outputPaths;
    @Nullable private String shellPath;
    @Nullable private String shellScript;

Class <org.gradle.ide.xcode.internal.xcodeproj.PBXBuildPhase> is not annotated (directly or via its package) with @org.gradle.api.NonNullApi in (PBXBuildPhase.java:0)
Class <org.gradle.ide.xcode.internal.xcodeproj.PBXBuildStyle> is not annotated (directly or via its package) with @org.gradle.api.NonNullApi in (PBXBuildStyle.java:0)