export declare const boolean: (a: any) => import("vue-demi").ComputedRef<boolean>;
export declare const invert: (a: any) => import("vue-demi").ComputedRef<boolean>;
export declare const isTruthy: (a: any) => import("vue-demi").ComputedRef<boolean>;
export declare const isFalsy: (a: any) => import("vue-demi").ComputedRef<boolean>;