import org.codelibs.fess.suggest.exception.SuggesterException;
import org.codelibs.fess.suggest.request.Response;

/**
 * <p>
 *   Deferred is a class that represents a deferred computation.
 *   It is similar to a Promise in JavaScript.
 *   It allows you to register callbacks that will be executed when the computation is complete,
 *   either successfully (resolve) or with an error (reject).
 * </p>
 *
 * <p>