import { TargetingAttributes, TargetingAttributeValue } from '../interfaces/feature-flag.interface';
interface AttributeValidationOptions {
    allowEmpty: boolean;
}
export declare function isTargetingAttributeValue(value: unknown): value is TargetingAttributeValue;
export declare function isTargetingAttributes(value: unknown, options?: AttributeValidationOptions): value is TargetingAttributes;
export declare function normalizeTargetingAttributes(value: unknown, options?: AttributeValidationOptions): TargetingAttributes;
export declare function matchesTargetingAttributes(overrideAttributes: TargetingAttributes, contextAttributes: TargetingAttributes): boolean;
export {};