@Inject
    public DefaultToolchainSpec() {
        getVendor().convention(getConventionVendor());
        getImplementation().convention(getConventionImplementation());
    }
    @Override
    public JavaToolchainSpecInternal.Key toKey() {
        return new Key(getLanguageVersion().getOrNull(), getVendor().getOrNull(), getImplementation().getOrNull());
    }

    @Override
    public boolean isConfigured() {

        this.implementation = spec.getImplementation().get().toString();
    }

    @Optional
    @Input
    JavaLanguageVersion getLanguageVersion() {
        return javaLanguageVersion;
    }

    @Input
    String getVendor() {
        return vendor;
    }

    @Input
    String getImplementation() {
        return implementation;
    }

getSource(); public String getHumanReadableKey(); public String getAlias(); public void setAlias(String); public String getRole(); public void setRole(String); public String getRoleHint(); public void setRoleHint(String); public String getImplementation(); public void setImplementation(String); public String getVersion(); public void setVersion(String); public String getComponentType(); public void setComponentType(String); public String getInstantiationStra(); public org.codehaus.plexus.configuration.PlexusConfiguration...

        final Hasher cacheKeyHasher = Hashing.newHasher();

        logger.warn("Appending implementation to build cache key: {}",
            beforeExecutionState.getImplementation());
        beforeExecutionState.getImplementation().appendToHasher(cacheKeyHasher);

        beforeExecutionState.getAdditionalImplementations().forEach(additionalImplementation -> {

// end::custom-dependencies-type[]

// tag::custom-dependencies-scopes[]
    /**
     * Dependency scope called "implementation"
     */
    DependencyCollector getImplementation();
// end::custom-dependencies-scopes[]

     * <p>
     * Note that the implementation can only be configured if the {@link #getLanguageVersion() language version} is configured as well.
     *
     * @since 6.8
     */
    Property<JvmImplementation> getImplementation();

    @Override
    default String getDisplayName() {
        final MoreObjects.ToStringHelper builder = MoreObjects.toStringHelper("");
        builder.omitNullValues();

            this.afterExecutionOutputState = afterExecutionOutputState;
        }

        @Override
        public ImplementationSnapshot getImplementation() {
            return beforeExecutionState.getImplementation();
        }

        @Override
        public ImmutableList<ImplementationSnapshot> getAdditionalImplementations() {

        ClassImplementationSnapshot currentImplementation = Cast.uncheckedNonnullCast(thisExecution.getImplementation());
        ClassImplementationSnapshot previousImplementation = Cast.uncheckedNonnullCast(lastExecution.getImplementation());
        ImmutableList<ImplementationSnapshot> currentAdditionalImplementations = Cast.uncheckedNonnullCast(thisExecution.getAdditionalImplementations());

// tag::wire-dependencies[]
        project.getConfigurations().dependencyScope("exampleImplementation", conf -> {
            conf.fromDependencyCollector(example.getDependencies().getImplementation());
        });
// end::wire-dependencies[]
    }

 */
public interface ExecutionInputState {
    /**
     * The main implementation snapshots.
     */
    ImplementationSnapshot getImplementation();

    /**
     * Used only for tasks to return all the task actions.
     */
    ImmutableList<ImplementationSnapshot> getAdditionalImplementations();

    /**
     * The non-file inputs.
     */