/**

 * Performs operations upon an input object which may modify that object and/or

 * external state (other objects).

 *

 * <p>All block implementations are expected to:

 * <ul>

 * <li>When used for aggregate operations upon many elements blocks

 * should not assume that the {@code apply} operation will be called upon

 * elements in any specific order.</li>

 * </ul>

 *

 * @param <T> The type of input objects to {@code apply}.

 */

public interface TBlock<T> {

    /**

     * Performs operations upon the provided object which may modify that object

     * and/or external state.

     *

     * @param t an input object

     */

    void apply(T t);

    /**

     * Returns a Block which performs in sequence the {@code apply} methods of

     * multiple Blocks. This Block's {@code apply} method is performed followed

     * by the {@code apply} method of the specified Block operation.

     *

     * @param other an additional Block which will be chained after this Block

     * @return a Block which performs in sequence the {@code apply} method of

     * this Block and the {@code apply} method of the specified Block operation

     */

    public default TBlock<T> chain(TBlock<? super T> other) {

        return (T t) -> { apply(t); other.apply(t); };

    }

}