* If the cache already contains the outputs for the given work, an already finished {@link Deferrable} will be returned.
         * Otherwise, the execution is wrapped in a not-yet-complete {@link Deferrable} to be evaluated later.
         * The work is looked up by its {@link UnitOfWork.Identity identity} in the given cache.
         */
        <T> Deferrable<Try<T>> executeDeferred(Cache<Identity, IdentityCacheResult<T>> cache);
    }

import org.gradle.api.internal.file.FileCollectionFactory;
import org.gradle.api.internal.project.ProjectInternal;
import org.gradle.api.internal.project.ProjectStateRegistry;
import org.gradle.cache.Cache;
import org.gradle.internal.Deferrable;
import org.gradle.internal.Try;
import org.gradle.internal.buildoption.InternalOptions;
import org.gradle.internal.buildoption.StringInternalOption;
import org.gradle.internal.execution.ExecutionEngine;