export type NormalizeAction<T> = (value: Record<string, any>, errors: string[]) => T | null;
export declare function buildNormalizeFunctionForObject<TObject>(action: NormalizeAction<TObject>): (obj: unknown, errCtx?: string[]) => TObject | null;
export declare function buildNormalizeFunctionForArray<TEntry>(action: NormalizeAction<TEntry>): (obj: unknown, errCtx?: string[]) => TEntry[] | null;
export declare function isStringAndNotEmpty(str: unknown): str is string;
export declare function isSpecified(obj: any, key: string): boolean;
export declare function applyDefaults<T extends Record<string, unknown>>(data: Partial<T> | null, defaults: T): T & Partial<T>;
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