Private (async_log.async_log.kernel.Async_log_kernel.Message

val create : 
  Ppx_log_types.Message_data.t ->
  Ppx_log_types.Message_source.t ->
  time:Core.Time_float.t ->
  level:Level.t option ->
  legacy_tags:(string * string) list ->
  user_scope:string option ->
  function_name:string option ->
  async_trace_span:Univ.t option ->
  t

val async_trace_span : t -> Univ.t option

val user_scope : t -> string option