Method cancel

ij/src/main/java/ij/util/ThreadUtil.java:87–87

(boolean mayInterruptIfRunning)

			Future[] futures = new Future[] {
				new Future() {
					public boolean cancel(boolean mayInterruptIfRunning) {return false;}
					public Object get() {return result;}
					public Object get(long timeout, TimeUnit unit) {return result;}
					public boolean isCancelled() {return false;}