DecodeKeyValue returns k, v, nil.

FromIncomingContext returns the incoming metadata in ctx if it exists.

FromOutgoingContext returns the outgoing metadata in ctx if it exists.

Join joins any number of mds into a single MD.

New creates an MD from a given key-value map.

NewIncomingContext creates a new context with incoming md attached.

NewOutgoingContext creates a new context with outgoing md attached.

Pairs returns an MD formed by the mapping of key, value ..

MD is a mapping from metadata keys to values.