public List<CounterError> getErrors() {
		if (errors == null) {
			return Collections.emptyList();
		}
		synchronized (errors) {
			return new ArrayList<>(errors);
		}
	}
@Test
	public void testGetErrors() {
		assertTrue("getErrors", counter.getErrors().isEmpty());
		assertNotNull("getErrors", new Counter(Counter.ERROR_COUNTER_NAME, null).getErrors());
	}