set_person: ref/unref person object
set_person: ref/unref person object

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