final PatternDescr pattern = new PatternDescr( Cheese.class.getName(),
"stilton" );
lhs.addDescr( pattern );
FieldBindingDescr fieldBindingDescr = new FieldBindingDescr( "price",
"x" );
pattern.addConstraint( fieldBindingDescr );
fieldBindingDescr = new FieldBindingDescr( "price",
"y" );
pattern.addConstraint( fieldBindingDescr );
packageDescr.addGlobal( new GlobalDescr( "map",
"java.util.Map" ) );