assertEquals(1, item3.getBlockers().size());
assertNull(item3.getBlocked());
assertSame( item2, ((LogicalDependency)item2.getBlocked().getFirst()).getJustifier() );
assertSame( item3, ((LogicalDependency)item2.getBlocked().getFirst()).getJustified() );
item3.removeAllBlockersAndBlocked(agenda);
assertNull(item3.getBlockers() );
assertNull( item3.getBlocked() );
assertEquals( 0, item2.getBlocked().size() );
assertNull( item2.getBlockers() );