*
     * @since 8.6
     */
    Throwable getFailure();

    /**
     * The type of operation that had the failure.
     *
     * @since 8.6
     */
    BuildCacheOperationType getOperationType();

    /**
     * The type of build cache operation.
     *
     * @since 8.6
     */
    enum BuildCacheOperationType {
        /**
         * @since 8.6
         */
        LOAD,

            return key.getHashCode();
        }

        @Override
        public Throwable getFailure() {
            return e;
        }

        @Override
        public BuildCacheOperationType getOperationType() {
            return operationType;
        }
    }