/// <reference types="react" />
export declare function assertContextValue(contextName: string, value: unknown): asserts value;
export declare function createContext<T>(contextName: string): {
    Context: import("react").Context<T | null>;
    Provider: import("react").Provider<T | null>;
    Consumer: import("react").Consumer<T | null>;
    useContext: () => NonNullable<T>;
};
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