Set read only properties. Refs gh-94
Set read only properties. Refs gh-94

midgardproject/midgard-core,piotras/midgard-core,piotras/midgard-core,piotras/midgard-core,midgardproject/midgard-core,midgardproject/midgard-core,piotras/midgard-core,midgardproject/midgard-core