import java.util.Set;

/**
 * Enriches class loading with empty interfaces for certain types that have been removed,
 * but which are baked into the bytecode generated by the Groovy compiler.
 */
public class DefaultLegacyTypesSupport implements LegacyTypesSupport {
    private static final Type OBJECT_TYPE = Type.getType(Object.class);

    private final Set<String> classesToMixInGroovyObject = readClassNames("converted-types.txt");

            }
        """)
        !GroovyObject.isAssignableFrom(original)

        expect:
        def loader = new MixInLegacyTypesClassLoader(groovyClassLoader, DefaultClassPath.of(classesDir), new DefaultLegacyTypesSupport())

        def cl = loader.loadClass(className)
        cl.classLoader.is(loader)
        cl.protectionDomain.codeSource.location == classesDir.toURI().toURL()
        cl.package.name == "org.gradle.api.plugins"

import org.gradle.cache.internal.CrossBuildInMemoryCacheFactory;
import org.gradle.cache.internal.DefaultCacheFactory;
import org.gradle.cache.internal.DefaultCrossBuildInMemoryCacheFactory;
import org.gradle.initialization.DefaultLegacyTypesSupport;
import org.gradle.initialization.LegacyTypesSupport;
import org.gradle.internal.classloader.ClassLoaderFactory;
import org.gradle.internal.classloader.DefaultClassLoaderFactory;

    ...

// Thrown by ProjectBuilder
org.gradle.api.GradleException: Could not inject synthetic classes.
	at org.gradle.initialization.DefaultLegacyTypesSupport.injectEmptyInterfacesIntoClassLoader(DefaultLegacyTypesSupport.java:91)
	at org.gradle.testfixtures.internal.ProjectBuilderImpl.getGlobalServices(ProjectBuilderImpl.java:182)