Module utils 

Type Aliases

DeepImmutable

DeepImmutable is a TypeScript conditional type that recursively makes all properties readonly. In Rust, immutability is the default, so this type serves as documentation rather than an active constraint.

Permutations

Permutations type in TypeScript generates all possible orderings of a union. In Rust, this doesn’t have a direct type-level equivalent, but can be implemented at runtime for enums.