Requiem.QUIC.Config.set_application_protos

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

set_application_protos(ptr, protos)

Specs

set_application_protos(integer(), list()) ::
  :ok | {:error, :system_error | :not_found}