import { DirectiveType, HostSource, PredefinedSource, SchemaSource } from '../../types';
import { AbstractMultiValueDirective } from '../abstract-multi-value-directive';
export declare type FrameAncestorsSource = SchemaSource | HostSource | PredefinedSource.Self | PredefinedSource.None;
export declare class FrameAncestors extends AbstractMultiValueDirective<FrameAncestorsSource> {
    getDirectiveName(): string;
    getDirectiveType(): DirectiveType;
    getMinimumCspVersion(): number;
}