# utils

- [Context](/elin/contracts-4.5.0/utils/context.md)
- [Strings](/elin/contracts-4.5.0/utils/strings.md)
- [introspection](/elin/contracts-4.5.0/utils/introspection.md)
- [ERC165](/elin/contracts-4.5.0/utils/introspection/erc165.md)
- [IERC165](/elin/contracts-4.5.0/utils/introspection/ierc165.md)
- [structs](/elin/contracts-4.5.0/utils/structs.md)
- [EnumerableSet](/elin/contracts-4.5.0/utils/structs/enumerableset.md)