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- export const mutable = <T extends readonly any[] | Record<string, unknown>>(val: T) => val as Mutable<typeof val>
- export type Mutable<T> = { -readonly [P in keyof T]: T[P] }
- export type HTMLElementCustomized<T> = HTMLElement & T
- /**
- * @deprecated stop to use null
- * @see {@link https://github.com/sindresorhus/meta/discussions/7}
- */
- export type Nullable<T> = T | null
- export type Arrayable<T> = T | T[]
- export type Awaitable<T> = Promise<T> | T
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