import { string } from "../../utils";
export declare type Capability = string;
export declare class Capabilities {
    readonly capabilities: Set<Capability>;
    constructor(capabilities: Set<Capability>);
    static get all(): Capabilities;
    static get safe(): Capabilities;
    allows(capability: Capability): boolean;
    require(set: Set<Capability>): Set<string>;
    restrict(new_set: Set<Capability>): Capabilities;
}
export declare abstract class CrochetCapability {
    static get spec(): typeof string;
}