/** Void function. */
export type Fn = () => void;
/** Something may be a promise. */
export type MaybePromise<T> = T | PromiseLike<T>;
/** Null or undefined. */
export type nil = null | undefined;
/** Something may be nullish. */
export type Option<T> = T | nil;
/** Removes the readonly modifier from all properties of T. */
export type Writable<T> = {
    -readonly [P in keyof T]: T[P];
};