The Rust standard library provides a "default" module, which declares a trait named "Default." This trait provides a single, simple method declaration called "default()" that you can implement on your custom Rust structs. The purpose of this default() function is to simplify the construction of new Rust struct instances. Normally you'd need to specify every single data field, when instantiating your structs. With default(), you can configure some "sane" default values in a standardized way that Rust's primitive types also use (ie. i32, u16, String, etc.).
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