return configurationAttributes;
        }

        private AttributeContainer concat(AttributeContainer configAttributes, AttributeContainer dependencyAttributes) {
            return attributesFactory.concat(
                ((AttributeContainerInternal) configAttributes).asImmutable(),
                ((AttributeContainerInternal) dependencyAttributes).asImmutable()
            );
        }

    private final AttributeContainer sourceAttributes;
    protected final TransformUpstreamDependencies upstreamDependencies;
    private final long transformStepNodeId;

    private PlannedTransformStepIdentity cachedIdentity;

    protected TransformStepNode(
        long transformStepNodeId,
        ComponentVariantIdentifier targetComponentVariant,
        AttributeContainer sourceAttributes,

 */

package org.gradle.language.nativeplatform.internal;

import org.apache.commons.lang.StringUtils;
import org.gradle.api.Action;
import org.gradle.api.Named;
import org.gradle.api.attributes.AttributeContainer;
import org.gradle.api.attributes.Usage;
import org.gradle.api.internal.attributes.ImmutableAttributesFactory;
import org.gradle.api.internal.component.DefaultSoftwareComponentVariant;

            throw shouldNotBeCalled();
        }

        @Override
        public AttributeContainer getAttributes() {
            throw shouldNotBeCalled();
        }

        @Override
        public DependencyConstraint attributes(Action<? super AttributeContainer> configureAction) {
            throw shouldNotBeCalled();
        }

        @Override

    }

    @Override
    public <T> AttributeContainer attribute(Attribute<T> key, T value) {
        throw new UnsupportedOperationException("Mutation of attributes is not allowed");
    }

    @Override
    public ImmutableSet<Attribute<?>> keySet() {
        return hierarchy.keySet();
    }

    @Override
    public <T> AttributeContainer attributeProvider(Attribute<T> key, Provider<? extends T> provider) {

 */

package org.gradle.api.internal.artifacts.transform;

import com.google.common.collect.ImmutableList;
import org.gradle.api.artifacts.component.ComponentIdentifier;
import org.gradle.api.attributes.AttributeContainer;
import org.gradle.api.internal.artifacts.ivyservice.resolveengine.artifact.ResolvableArtifact;
import org.gradle.api.internal.artifacts.ivyservice.resolveengine.artifact.ResolvedArtifactSet;

import org.gradle.api.artifacts.component.ComponentSelector;
import org.gradle.api.artifacts.component.LibraryComponentSelector;
import org.gradle.api.artifacts.component.ModuleComponentSelector;
import org.gradle.api.attributes.AttributeContainer;
import org.gradle.api.capabilities.Capability;
import org.gradle.api.internal.artifacts.DefaultModuleIdentifier;
import org.gradle.api.internal.artifacts.ImmutableVersionConstraint;

import org.gradle.api.Action;
import org.gradle.api.artifacts.component.ComponentIdentifier;
import org.gradle.api.artifacts.result.ArtifactResult;
import org.gradle.api.attributes.AttributeContainer;
import org.gradle.api.attributes.AttributesSchema;
import org.gradle.api.internal.artifacts.ComponentMetadataProcessor;
import org.gradle.api.internal.artifacts.ComponentMetadataProcessorFactory;

            mutated = true;
        }

        @Override
        public void attributes(Action<? super AttributeContainer> attributesConfiguration) {
            mutated = true;
            attributesConfiguration.execute(attributes);
        }

        @Override
        public AttributeContainer getAttributes() {
            mutated = true;
            return attributes;
        }

            return false;
        }
        return true;
    }

    @Override
    public AttributeContainer getAttributes() {
        return attributes == null ? ImmutableAttributes.EMPTY : attributes.asImmutable();
    }

    @Override
    public AbstractModuleDependency attributes(Action<? super AttributeContainer> configureAction) {
        validateMutation();
        validateNotLegacyConfigured();