module Open_on_rhs : Generator with type 'a t := 'a Generator.t and module Let_syntax := Generator.Let_syntax
include Base.Monad.Syntax with type 'a t := 'a Generator.t and module Let_syntax.Let_syntax.Open_on_rhs = Open_on_rhs
module Let_syntax : sig ... end with module Let_syntax.Let_syntax.Open_on_rhs = Open_on_rhs