val return : 'a -> 'a Async_kernel.Deferred.tval bind : 'a Async_kernel.Deferred.t -> f:('a -> 'a Async_kernel.Deferred.t) -> 'a Async_kernel.Deferred.tval map : 'a Async_kernel.Deferred.t -> f:('a -> 'b) -> 'a Async_kernel.Deferred.tval both : 'a Async_kernel.Deferred.t -> 'a Async_kernel.Deferred.t -> 'a Async_kernel.Deferred.tmodule Open_on_rhs : sig ... end