// europe=[ 1, 2 ], america=[ 3 ]
p1.setStatus( "europe" );
workingMemory.update( c1FactHandle,
p1 );
workingMemory.fireAllRules();
cheeseList = IteratorToList.convert( workingMemory.iterateObjects( new ClassObjectFilter( Cheese.class ) ) );
assertEquals( 1,
cheeseList.size() );
// europe=[ 1, 2, 3 ], america=[ ]
p3.setStatus( "europe" );