option-t/esm/internal/assert.d.ts

A toolkit of Nullable/Option/Result type implementation in ECMAScript. Their APIs are inspired by Rust's `Option<T>` and `Result<T, E>`.

export declare function isCurrentRealmErrorInstance(input: unknown): input is Error;
export declare function assertIsErrorInstance(input: unknown, message: string): asserts input is Error;
export declare function assertIsNotFrozen(input: unknown): void;