Return NULL if manager doesn't hold connection's pointer
Return NULL if manager doesn't hold connection's pointer

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