Added transfer annotation. Refs gh-25
Added transfer annotation. Refs gh-25

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