//! # FRAME Accounts
//!
//! How `frame_system` handles accountIds. Nonce. Consumers and Providers, reference counting.

// - poorly understood topics, needs one great article to rul them all.
// - https://github.com/paritytech/substrate/issues/14425
// - https://github.com/paritytech/substrate/pull/12951
// - https://substrate.stackexchange.com/questions/263/what-is-the-meaning-of-the-account-provider-sufficients-and-consumer