Imports
- google.golang.org/grpc/metadata
- github.com/hyperledger/fabric/orderer/common/broadcast
- github.com/hyperledger/fabric/orderer/common/msgprocessor
- github.com/hyperledger/fabric/common/metrics
- github.com/hyperledger/fabric/protos/common
- github.com/hyperledger/fabric/protos/orderer
- golang.org/x/net/context