Contains checks if str is in list.

Deref dereferences a type, if pointer type, returns its element type.

NewUnmarshaler returns an Unmarshaler.

SetMapIndexValue sets target to value at key position, pointers are processed automatically.

SetValue sets target to value, pointers are processed automatically.

TakeOne returns valid string if not empty or later one.

UnmarshalJsonMap unmarshals content from m into v.

ValidatePtr validates v if it's a valid pointer.

WithCanonicalKeyFunc customizes an Unmarshaler with Canonical Key func.