// Copyright 2021 Cargill Incorporated
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
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//! A trait for messages sent between processes.
/// A message sent between processes.
///
/// [`Message`]s are sent across a network which connects the processes together[^note].
///
/// [^note]: For a full explanation of messages and the relation to other components, see Cachin,
/// Guerraoui, and Rodrigues, Reliable and Secure Distributed Programming, 2nd ed., 2.1.1.