import { PipeTransform } from '@angular/core';
export declare class MimeTypeMasterData {
    static readonly COLLECTION = "application/vnd.ekstep.content-collection";
    static readonly VIDEO: string[];
    static readonly AUDIO: string[];
    static readonly INTERACTIVE: string[];
    static readonly DOCS: string[];
    static readonly ALL: string[];
}
export declare class MimeTypePipe implements PipeTransform {
    transform(item?: any, mimeTypes?: string[], isTextbookTocPage?: boolean): boolean;
    getFilteredItems(contents: any, mimeTypes: string[]): boolean;
    private flattenDeep;
}