listOf(TLS_1_3, TLS_1_2).flatMap { tlsVersion ->
            listOf(Channel, Standard).flatMap { socketMode ->
              listOf(DISABLED, STANDARD).map { tlsExtensionMode ->
                TlsInstance(provider, protocol, tlsVersion, socketMode, tlsExtensionMode)
              }
            }
          }
        }
      } + Channel + Standard
  }
}

sealed class SocketMode

object Channel : SocketMode() {

// for code that resides in the standard library.
package issue18331

//go:unknown // ERROR "//go:unknown is not allowed in the standard library"
func foo()

//go:nowritebarrierc // ERROR "//go:nowritebarrierc is not allowed in the standard library"
func bar()

//go:noesape // ERROR "//go:noesape is not allowed in the standard library"
func groot()

//go:noescape

    | org.gradle.usage               | java-runtime | java-runtime |
    | org.gradle.dependency.bundling |              | external     |
    | org.gradle.jvm.environment     |              | standard-jvm |
    | org.gradle.jvm.version         |              | 11           |

io.vertx:vertx-lang-groovy:3.9.4
\--- runtimeClasspath

io.vertx:vertx-lang-groovy-gen:3.9.4
  Variant runtime:

		If a file's formatting is different than gofmt's, print diffs
		to standard output.
	-e
		Print all (including spurious) errors.
	-l
		Do not print reformatted sources to standard output.
		If a file's formatting is different from gofmt's, print its name
		to standard output.
	-r rule
		Apply the rewrite rule to the source before reformatting.
	-s
		Try to simplify code (after applying the rewrite rule, if any).

@HasInternalProtocol
public interface LoggingOutput {
    /**
     * Adds a listener which receives output written to standard output by the Gradle logging system.
     *
     * @param listener The listener to add.
     */
    void addStandardOutputListener(StandardOutputListener listener);

    /**
     * Removes a listener from standard output.
     *
     * @param listener The listener to remove.
     */

    | org.gradle.usage               | java-runtime | java-runtime |
    | org.gradle.dependency.bundling |              | external     |
    | org.gradle.jvm.environment     |              | standard-jvm |
    | org.gradle.jvm.version         |              | 11           |

io.vertx:vertx-lang-groovy:3.9.4
\--- runtimeClasspath

io.vertx:vertx-lang-groovy-gen:3.9.4
  Variant runtime:

    @Override
    public BaseExecSpec setStandardInput(InputStream inputStream) {
        throw new UnsupportedOperationException("Standard streams cannot be configured for exec output provider");
    }

    @Override
    public InputStream getStandardInput() {
        throw new UnsupportedOperationException("Standard streams cannot be configured for exec output provider");
    }

    @Override

        then:
        expectAndroid()
    }

    def "prefers standard JVM variant by default"() {
        given:
        prepareResolve('legacy', 'jre')

        when:
        run ':checkDeps'

        then:
        expectStandardJVM()
    }

    def "can enforce standard JVM variant on Android by constraint"() {
        given:

    /**
     * Creates a {@code StyledTextOutput} with the given category and the standard output log level.
     *
     * @param logCategory The log category.
     * @return the output
     */
    StyledTextOutput create(String logCategory);

    /**
     * Creates a {@code StyledTextOutput} with the given category and the standard output log level.
     *
     * @param logCategory The log category.
     * @return the output

                'org.gradle.jvm.environment': of('', 'standard-jvm')
            ])}

${variantOf('mainSourceElements', [
                'org.gradle.verificationtype': of('main-sources', ''),
                'org.gradle.category': of('verification', 'library'),
                'org.gradle.dependency.bundling': of('external', 'external'),
                'org.gradle.jvm.environment': of('', 'standard-jvm'),