if (classPath instanceof TransformedClassPath) {
            return plusWithTransforms((TransformedClassPath) classPath);
        }
        return new TransformedClassPath(originalClassPath.plus(classPath), transforms);
    }

    /**
     * {@inheritDoc}
     * <p>
     * The predicate is applied to the original classpath entries. The returned classpath keeps corresponding transformations.

        final String name;
        final List<URL> classpath;

        public String getName() {
            return name;
        }

        public Spec(String name, List<URL> classpath) {
            this.name = name;
            this.classpath = classpath;
        }

        public List<URL> getClasspath() {
            return classpath;
        }

        @Override

    def "Source folder defines one classpath attribute"() {
        settingsFile << 'rootProject.name = "root"'
        buildFile <<
            """apply plugin: 'java'
           apply plugin: 'eclipse'
           eclipse {
               classpath {
                   file {
                       whenMerged { classpath ->

        private final EclipseClasspath classpath;
        private final Set<File> files = new LinkedHashSet<>();

        private WtpClasspathAttributeDependencyVisitor(EclipseClasspath classpath) {
            this.classpath = classpath;
        }

        @Override
        public boolean isOffline() {
            return classpath.isProjectDependenciesOnly();
        }

        @Override

        e.message == 'unknown classpath \'name\' requested.'
    }

    def "delegates to providers to find classpath"() {
        def classpath = Mock(ClassPath)

        given:
        provider1.findClassPath(_) >> null
        provider2.findClassPath("name") >> classpath

        expect:
        registry.getClassPath("name") == classpath
    }

import org.gradle.internal.buildoption.InternalOptions
import org.gradle.internal.classloader.ClasspathHasher
import org.gradle.internal.classpath.CachedClasspathTransformer
import org.gradle.internal.classpath.ClassPath
import org.gradle.internal.classpath.DefaultClassPath
import org.gradle.internal.classpath.transforms.ClasspathElementTransformFactoryForLegacy
import org.gradle.internal.execution.ExecutionEngine

            return modules;
        }

        @Override
        public ClassPath getAllRequiredModulesClasspath() {
            ClassPath classPath = ClassPath.EMPTY;
            for (Module module : getAllRequiredModules()) {
                classPath = classPath.plus(module.getClasspath());
            }
            return classPath;
        }

        private void collectRequiredModules(Set<Module> modules) {

    }

    class ClassDetails {
        final String path
        final String className
        final String classpath

        ClassDetails(String path, String className, String classpath) {
            this.path = path
            this.className = className
            this.classpath = classpath
        }
    }

           eclipse {
               classpath {
                   file {
                       whenMerged { classpath ->
                           classpath.entries.removeAll { it.kind == 'output' }
                           classpath.entries.add(new org.gradle.plugins.ide.eclipse.model.Output('$firstPath'))
                           classpath.entries.add(new org.gradle.plugins.ide.eclipse.model.Output('$secondPath'))

        assertThat(
            classPath.collect { it.name } as List<String>,
            hasItems(fileNameSetOf(files))
        )
    }

    protected static void assertExcludes(List<File> classPath, File... files) {
        assertThat(
            classPath.collect { it.name } as List<String>,
            not(hasItems(fileNameSetOf(files)))
        )
    }