def add_lambda(args)
      lamba = Lambda.new(id_generator.call, args)
      @lambdas_by_id[lamba.id] = lamba
      lamba
    end
def add_lambda(args)
      lamba = Lambda.new(id_generator.call, args)
      @lambdas_by_id[lamba.id] = lamba
      lamba
    end
Lambdas