| ⇢ | A | HeadersHelper added | |
| ⇢ | A | SerializerHelper added | |
| ⇢ | A | ObjectHelper added | |
| ⇢ | A | FormattedError added | |
| ⇢ | A | ParamConverterHelper added | |
| ⇢ | A | StringHelper added | |
| ⇢ | A | ClassHelper added | |
| ⇢ | A | ConstraintsHelper added | |
| A | ↛ | StringUtil removed | |
| A | ↛ | SerializerUtil removed | |
| A | ↛ | ConstraintsUtil removed | |
| A | ↛ | ContractError removed | |
| A | ↛ | HeadersUtil removed | |
| A | ↛ | ObjectUtil removed | |
| A | ↛ | ClassUtil removed | |
| A | ↛ | ParamConverterUtil removed |