export declare const isBoolean: (val: any) => boolean;
export declare const isObject: (item: any) => any;
export declare const isString: (item: any) => any;
/**
 * https://bobbyhadz.com/blog/javascript-get-difference-between-two-sets
 * @internal
 */
export declare function diffBetweenSets(setA: Set<any>, setB: Set<any>): Set<any>;
/**
 * @internal
 */
export declare const stringReplacer: (s: string) => string;
/**
 * @internal
 */
export declare const hashAlgorithmFromCspSourceValues: (arr: string[]) => {
    value: undefined;
    error: undefined;
} | {
    value: string;
    error: undefined;
} | {
    value: undefined;
    error: Error;
};
/**
 * @internal
 */
interface ContentHashConfig {
    algorithm: string;
    content: string;
}
/**
 * @internal
 */
export declare const contentHash: ({ algorithm, content }: ContentHashConfig) => string;
export {};
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