Requiem.QUIC.Config.enable_dgram

You're seeing just the function enable_dgram, go back to Requiem.QUIC.Config module for more information.
Link to this function

enable_dgram(ptr, enabled, recv_queue_len, send_queue_len)

Specs

enable_dgram(integer(), boolean(), non_neg_integer(), non_neg_integer()) ::
  :ok | {:error, :system_error | :not_found}