1. 1. Introduction
2. 2. Setup
3. 3. Code generation
4. 1. 3.1. Variant structs
   2. 3.2. Top-level enum
   3. 3.3. Ref and RefMut
   4. 3.4. Mapping macros
5. 4. Configuration
6. 1. 4.1. Struct attributes
   2. 4.2. Field attributes