return new SystemPropertyRead() {
            @Override
            String getJavaExpression() {
                return "(String)System.getProperties().entrySet().stream().filter(e -> e.getKey().equals(\"$name\")).findFirst().get().getValue()";
            }

            @Override
            String getGroovyExpression() {
                return "System.properties.entrySet().find { it.key == '$name'}.value"

                }

                int hashCode() {
                    assert a != null && z != null
                    a.hashCode() ^ z.hashCode()
                }

                boolean equals(Object other) {
                    assert a != null && z != null
                    (other instanceof Circular) && a == other.a && z == other.z
                }

                String toString() {

        !spec.isSatisfiedBy(GradleVersion.version("1.5"))
        !spec.isSatisfiedBy(GradleVersion.version("1.5-rc-1"))
        !spec.isSatisfiedBy(GradleVersion.version("12.45"))
    }

    def "equals version constraint matches versions with same base version"() {
        def spec = new GradleVersionSpec().toSpec("=1.4")

        expect:
        spec.isSatisfiedBy(GradleVersion.version("1.4"))

        // Verify some assumptions: that we've got the correct characters in there, and that we're not using the system encoding
        assert code.contains(new String(Character.toChars(0x3b1)))
        assert !Arrays.equals(code.bytes, file.bytes)
    }

    def badCode() {
        file("src/main/java/compile/test/Person.java") << """
            package compile.test;

            public class Person {

                }

                static void mirror(IvyArtifactRepository repo) {
                    ${mirrorConditions}
                }

                // We see them as equal:
                // https://repo.maven.apache.org/maven2/ and http://repo.maven.apache.org/maven2
                static String normalizeUrl(Object url) {

        output.count("files 1: [lib1.jar.size, lib2.jar.size, lib3.jar.size, lib4-1.0.jar.size]") == 2

        output.count("Transformed") == 0
    }

    def "can use custom type that does not implement equals() for transform configuration"() {
        given:
        buildFile << declareAttributes() << withJarTasks() << """
            class CustomType implements Serializable {
                String value
            }

import org.gradle.internal.deprecation.Documentation
import org.gradle.internal.operations.OperationIdentifier
import spock.lang.Specification

class DefaultProblemTest extends Specification {
    def "unbound builder result is equal to original"() {
        def additionalData = Mock(AdditionalData)
        def problem = createTestProblem(severity, additionalData)

        def newProblem = problem.toBuilder().build()
        expect: