@Test
public void testMultipleSinks() {

    final SpanSink first = mock(SpanSink.class);
    final SpanSink second = mock(SpanSink.class);
    SpanSinkRegistry.register(first);
    SpanSinkRegistry.register(second);
    final Span span = SpanHelper.startTrace("testSpan");
    span.end();
    verify(first).record(span);
    verify(second).record(span);
}