import java.util.concurrent.Callable;

import static org.gradle.internal.UncheckedException.uncheckedCall;

public class DeferredUtil {

    /**
     * Successively unpacks a deferred value until it is resolved to null or something other than Callable (including Groovy Closure) or Kotlin lambda
     * then unpacks the remaining Provider or Factory.
     *
     * Fails when the Provider is not present.
     */
    @Nullable

     */
    ImmutableSet<Class<? extends Annotation>> getAllowedModifiers();

    /**
     * Does this handler do something useful with the properties that match it? Or can these properties be ignored?
     *
     * Should consider splitting up this type, perhaps into something that inspects the properties and produces the actual handlers and validation problems.
     */
    boolean isPropertyRelevant();

    /**

/**
 * A class that can supply objects of a single type; a pre-Java-8 version of {@link
 * java.util.function.Supplier java.util.function.Supplier}. Semantically, this could be a factory,
 * generator, builder, closure, or something else entirely. No guarantees are implied by this
 * interface.
 *
 * <p>The {@link Suppliers} class provides common suppliers and related utilities.
 *
 * <p>See the Guava User Guide article on <a href=