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@polkadot/util

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A collection of useful utilities for @polkadot

github.com/polkadot-js/common/tree/master/packages/util

polkadot-js/common

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export declare function isOn<T>(...fns: (keyof T)[]): (value?: unknown) => value is T; export declare function isOnObject<T>(...fns: (keyof T)[]): (value?: unknown) => value is T;