### Question:
DomainDisplayEvent extends DisplayEvent { public DataChannelDescriptor getDomain() { return domain; } DomainDisplayEvent(Object src, DataChannelDescriptor domain); DataChannelDescriptor getDomain(); void setDomain(DataChannelDescriptor domain); boolean isDomainChanged(); void setDomainChanged(boolean domainChanged);  }### Answer:
@Test public void testDomain() throws Exception { DataChannelDescriptor d = new DataChannelDescriptor(); DomainDisplayEvent e = new DomainDisplayEvent(new Object(), d); assertSame(d, e.getDomain()); }