must_be_a_string_if_set(sensu[:server][:results_pipe]) ||
              invalid(sensu, "sensu server results_pipe must be a string")
            must_be_a_string_if_set(sensu[:server][:keepalives_pipe]) ||
              invalid(sensu, "sensu server keepalives_pipe must be a string")
            must_be_an_integer_if_set(sensu[:server][:max_message_size]) ||