object KotlinMetadataQueries {

    fun isKotlinFileFacadeClass(ctClass: CtClass): Boolean =
        if (Modifier.isPrivate(ctClass.modifiers)) false
        else queryKotlinMetadata(ctClass) { metadata ->
            when (metadata) {
                is KotlinClassMetadata.FileFacade -> true
                else -> false
            }
        }

    fun isKotlinInternal(ctClass: CtClass): Boolean =

    }

    private Map<String, CtClass> collectImplementedInterfaces(CtClass c) {
        Map<String, CtClass> result = [:]
        collect(result, c)
        return result
    }

    private void collect(Map<String, CtClass> result, CtClass c) {
        c.interfaces.each { result.put(it.name, it) }

        if (c.superclass != null) {

        else -> error("Unsupported japicmp member type '${this::class}'")
    }


/**
 * [CtClass] or [CtMember].
 */
private
typealias CtClassOrCtMember = Any


private
val CtClassOrCtMember.declaringClass: CtClass
    get() = when (this) {
        is CtClass -> declaringClass ?: this
        is CtMember -> declaringClass

    }

    private List<String> filterChangesToReport(CtClass c, Set<CtMethod> methods) {
        return methods.findAll { isFirstPublicClassInHierarchy(it, c) }*.longName.sort()
    }

    private boolean isFirstPublicClassInHierarchy(CtMethod method, CtClass c) {
        List<CtClass> classesContainingMethod = []

        CtClass current = c
        while (current != null) {

    interface IncubatingInterface {}

    interface InternalInterface {}

    interface StablePublicInterface {}

    CtClass oldBase
    CtClass newBase
    CtClass newSuper
    CtClass newIncubatingBase
    CtClass internalInterface
    CtClass incubatingInterface
    CtClass stablePublicInterface

    Map interfaces

    def setup() {

        }
        return null
    }

    private static List<Boolean> typeParametersNullabilityOf(CtClass ctClass) {
        NullableClassTypeParametersVisitor visitor = new NullableClassTypeParametersVisitor()
        new ClassReader(byteCodeFrom(ctClass)).accept(visitor, 0)
        return visitor.typeParametersNullability
    }

    }

    protected abstract boolean changed(JApiCompatibility member)

    protected abstract Violation checkSuperClassChanges(JApiClass apiClass, CtClass oldClass, CtClass newClass)

    protected boolean isInternal(CtClass c) {
        if (c.name.startsWith("java.")) {
            return false
        } else if (c.name.contains('.internal.')) {
            return true
        } else {

import japicmp.filter.ClassFilter
import javassist.CtClass
import org.gradle.api.Generated

/**
 * $$BridgeFor$$ classes generated for bytecode upgrade instrumentation
 */
class BridgeForBytecodeUpgradeAdapterClassFilter implements ClassFilter {

    private static final BRIDGE_CLASS_PREFIX = "\$\$BridgeFor\$\$"

    @Override
    boolean matches(CtClass ctClass) {

import japicmp.filter.FieldFilter
import javassist.CtBehavior
import javassist.CtClass
import javassist.CtField

/**
 * Matches Kotlin <code>internal</code> members.
 */
class KotlinInternalFilter implements ClassFilter, FieldFilter, BehaviorFilter {

    @Override
    boolean matches(CtClass ctClass) {
        return KotlinMetadataQueries.INSTANCE.isKotlinInternal(ctClass)
    }

    @Override
    boolean matches(CtField ctField) {

import japicmp.filter.ClassFilter
import javassist.CtClass

import java.util.regex.Pattern

/**
 * Matches JVM anonymous classes.
 */
class AnonymousClassesFilter implements ClassFilter {

    private static final Pattern PATTERN = Pattern.compile('.*\\$[0-9]+$')

    @Override
    boolean matches(CtClass ctClass) {
        return ctClass.name.matches(PATTERN)
    }