Package customerror provides the base block to create custom errors. It also provides built-in custom errors covering some common cases. A Custom Error provides context - a `Message` to an optionally wrapped `Err`. Additionally a `Code` - for example "E1010", and `StatusCode` can be provided. Both static (pre-created), and dynamic (in-line) errors can be easily created. `Code` helps a company build a catalog of errors, which helps, and improves customer service. Examples: See `example_test.go` or the Example section of the GoDoc documention.