Key_value (opentelemetry.Opentelemetry_core.Key

type t = string * Value.t

val conv : 
  (string
   * [< `Bool of bool
     | `Float of float
     | `Int of int
     | `None
     | `String of string ]) ->
  Opentelemetry_core.Common_.Proto.Common.key_value

val of_otel : Opentelemetry_core.Common_.Proto.Common.key_value -> t