pattern1.addConstraint( fieldBindingDescr );
pattern1.addConstraint( literalDescr );
final PatternDescr pattern2 = new PatternDescr( Cheese.class.getName() );
lhs.addDescr( pattern2 );
pattern2.addConstraint( fieldBindingDescr );
ruleDescr.setConsequence( "update(stilton);" );
builder.addPackage( packageDescr );