DefaultPolicyDescriptor descriptor =
new DefaultPolicyDescriptor();
descriptor.setCategory("category");
DefaultStructurePolicyType structure =
new DefaultStructurePolicyType();
structure.addFieldType("f1", new DefaultBooleanPolicyType());
structure.addFieldType("f2", new DefaultIntPolicyType());
structure.complete();
descriptor.setPolicyType(structure);
accessor.addPolicyDescriptor(connection, "structure", descriptor);
accessor.removePolicyDescriptor(connection, "structure");