## Linker {#linker}

<!-- go.dev/issue/67401, CL 585556, CL 587220, and many more -->
The linker now disallows using a `//go:linkname` directive to refer to
internal symbols in the standard library (including the runtime) that
are not marked with `//go:linkname` on their definitions.
Similarly, the linker disallows references to such symbols from assembly
code.
For backward compatibility, existing usages of `//go:linkname` found in

  /**
   * This classloader disallows {@link sun.misc.Unsafe}, which will prevent us from selecting our
   * preferred strategy {@code UnsafeAtomicHelper}.
   */
  @SuppressWarnings({"SunApi", "removal"}) // b/345822163
  private static final ClassLoader NO_UNSAFE =
      getClassLoader(ImmutableSet.of(sun.misc.Unsafe.class.getName()));

  /**

  /**
   * This classloader disallows {@link sun.misc.Unsafe}, which will prevent us from selecting our
   * preferred strategy {@code UnsafeAtomicHelper}.
   */
  @SuppressWarnings({"SunApi", "removal"}) // b/345822163
  private static final ClassLoader NO_UNSAFE =
      getClassLoader(ImmutableSet.of(sun.misc.Unsafe.class.getName()));

  /**

        1 * redir.redirectStandardOutputTo({ it.dest == TestOutputEvent.Destination.StdOut })

        then:
        1 * redir.start()
        0 * _
    }

    def "disallows starting redirecting if test owner not provided"() {
        when: redirector.startRedirecting()
        then: thrown(AssertionError)
    }

    def "allows setting output owner"() {
        when:

		// Entire set of ASCII punctuation, from which we remove characters:
		//     ! " # $ % & ' ( ) * + , - . / : ; < = > ? @ [ \ ] ^ _ ` { | } ~
		// We disallow some shell special characters: " ' * < > ? ` |
		// (Note that some of those are disallowed by the Windows file system as well.)
		// We also disallow path separators / : and \ (fileNameOK is only called on path element characters).
		// We allow spaces (U+0020) in file names.

     * @param provider The provider of the elements
     * @return this
     * @since 5.1
     */
    HasMultipleValues<T> convention(Provider<? extends Iterable<? extends T>> provider);

    /**
     * Disallows further changes to the value of this property. Calls to methods that change the value of this property, such as {@link #set(Iterable)} or {@link #add(Object)} will fail.
     *

     * This is similar to calling {@link #convention(Map)} with a <code>null</code> argument.
     * </p>
     */
    @Incubating
    @Override
    MapProperty<K, V> unsetConvention();

    /**
     * Disallows further changes to the value of this property. Calls to methods that change the value of this property, such as {@link #set(Map)} or {@link #put(Object, Object)} will fail.
     *

var SameNetwork CombinationFilter = func(from echo.Instance, to echo.Instances) echo.Instances {
	return match.Network(from.Config().Cluster.NetworkName()).GetMatches(to)
}

// NoSelfCalls disallows self-calls where from and to have the same service name. Self-calls can
// by-pass the sidecar, so tests relying on sidecar logic will sent to disable self-calls by default.

     *
     * <p>
     * This is similar to calling {@link #convention(Object)} with a <code>null</code> argument.
     * </p>
     */
    @Override
    Property<T> unsetConvention();

    /**
     * Disallows further changes to the value of this property. Calls to methods that change the value of this property,
     * such as {@link #set(Object)}, {@link #set(Provider)}, {@link #value(Object)} and {@link #value(Provider)} will fail,

                incomingEdge.failWith(new ModuleVersionResolveException(selector, () ->
                    String.format("Could not resolve %s: Resolution strategy disallows usage of dynamic versions", selector)));
            }
        }
    }

    private static void validateChangingVersions(ComponentState selected) {