Mavryk_raw_protocol_alpha.Dal_servicesval shards :
Alpha_context.t ->
level:Alpha_context.Level.t ->
(Alpha_context.t
* int list Mavryk_protocol_environment_alpha.Signature.Public_key_hash.Map.t)
Mavryk_protocol_environment_alpha.Error_monad.tzresult
Mavryk_protocol_environment_alpha.Lwt.tshards ctxt ~level returns the DAL committee as a mapping from the public key hash of members of the committee to the list of shard indexes associated to that member.