* @return this
     * @since 5.6
     */
    HasMultipleValues<T> value(Provider<? extends Iterable<? extends T>> provider);

    /**
     * Sets the value of this property to an empty collection, and replaces any existing value.
     *
     * @return this property.
     * @since 5.0
     */
    HasMultipleValues<T> empty();

    /**
     * Adds an element to the property value.
     *

 *
 * @since 8.2
 */
fun <T> HasMultipleValues<T>.assign(elements: Iterable<T?>?) {
    this.set(elements)
}


/**
 * Sets the property to have the same value of the given provider, and replaces any existing value
 *
 * @since 8.2
 */
fun <T> HasMultipleValues<T>.assign(provider: Provider<out Iterable<T?>?>) {
    this.set(provider)
}


/**

    @Override
    protected <T extends HasMultipleValues<String> & Provider<Collection<String>>> T multiValueProperty() {
        return setProperty
    }

    @Override
    protected <T extends Collection<String>> T cast(Collection<String> collection) {
        return collection as Set<String>
    }

    @Override
    protected <T extends Collection<String>> T newCollection(HasMultipleValues<String> multipleValueProperty) {

package org.gradle.api.internal.tasks.options;

import org.gradle.api.NonNullApi;
import org.gradle.api.file.FileSystemLocation;
import org.gradle.api.file.FileSystemLocationProperty;
import org.gradle.api.provider.HasMultipleValues;
import org.gradle.api.provider.Property;
import org.gradle.api.tasks.options.Option;
import org.gradle.internal.Cast;
import org.gradle.internal.reflect.JavaMethod;
import org.gradle.model.internal.type.ModelType;

    @Override
    protected <T extends HasMultipleValues<String> & Provider<Collection<String>>> T multiValueProperty() {
        return listProperty
    }

    @Override
    protected <T extends Collection<String>> T cast(Collection<String> collection) {
        return collection as List<String>
    }

    @Override
    protected <T extends Collection<String>> T newCollection(HasMultipleValues<String> multipleValueProperty) {

import org.apache.commons.lang.StringUtils;
import org.gradle.api.NonNullApi;
import org.gradle.api.file.FileSystemLocation;
import org.gradle.api.file.FileSystemLocationProperty;
import org.gradle.api.provider.HasMultipleValues;
import org.gradle.api.provider.Property;
import org.gradle.api.tasks.options.Option;
import org.gradle.internal.Cast;
import org.gradle.internal.reflect.JavaMethod;
import org.gradle.model.internal.type.ModelType;

import org.gradle.api.provider.HasMultipleValues
import org.gradle.api.provider.Provider
import spock.lang.Specification

abstract class AbstractHasMultiValuesPropertyCollectionViewTest extends Specification {

    protected abstract <T extends Collection<String>> T cast(Collection<String> collection)
    protected abstract <T extends HasMultipleValues<String> & Provider<Collection<String>>> T multiValueProperty()

 *     <li>{@link org.gradle.api.internal.provider.AbstractCollectionProperty} - implements the API for
 *     collection properties (specified via {@link org.gradle.api.provider.HasMultipleValues HasMultipleValues}) namely {@link org.gradle.api.provider.ListProperty list} and {@link org.gradle.api.provider.SetProperty set} properties).</li>

            asMapProperty.convention(convention);
        } else if (target instanceof HasMultipleValues) {
            HasMultipleValues<Object> asCollectionProperty = Cast.uncheckedNonnullCast(target);
            asCollectionProperty.convention(new DefaultProvider<>(() -> Cast.uncheckedNonnullCast(mapping.getValue(_convention, _source))));

 * <p><b>Note:</b> This interface is not intended for implementation by build script or plugin authors.
 *
 * @param <T> the type of elements.
 * @since 4.3
 */
public interface ListProperty<T> extends Provider<List<T>>, HasMultipleValues<T> {
    /**
     * {@inheritDoc}
     */
    @Override
    ListProperty<T> empty();

    /**
     * {@inheritDoc}
     */
    @Override