Commercial paper state mapping

commercial_maper_state_mapping.go

var (
  // State mappings
	StateMappings = m.StateMappings{}.
		//key namespace will be <`CommercialPaper`, Issuer, PaperNumber>
		Add(&schema.CommercialPaper{}, m.PKeySchema(&schema.CommercialPaperId{}))

	// EventMappings
	EventMappings = m.EventMappings{}.
		// event name will be `IssueCommercialPaper`,  payload - same as issue payload
		Add(&schema.IssueCommercialPaper{}).
		Add(&schema.BuyCommercialPaper{}).
		Add(&schema.RedeemCommercialPaper{})
)

with imports it will more understandable what is the 'm'