declare class ConditionBase<S> {
    /**
     * Negates the following assertion.
     */
    get not(): this;
    /**
     * Grabs and returns current `subject` or a reference to subject remembered by `refName`.
     * @example
     * Combine together with `query()` to grab reference to an entity:
     * ```ts
     * const pile = test().query({ type: "pile" }).grab()
     * ```
     * @example
     * grab previously remembered entity:
     * ```ts
     * test().remember("pile", { type: "pile" })
     * const pile = test().grab("pile")
     * ```
     */
    grab<T>(refName?: string): T;
    /**
     * @deprecated you can just grab state from context
     * @returns State related with this Conditions instance.
     */
    grabState(): S;
}
export { ConditionBase };