/// <reference types="screeps" />
/**
 * Optimized check for {@link Structure.isActive}.
 * If using default getMaxLevel, you should call {@link isStructureActive.update} in your loop.
 * @author tigga 20180224
 * @param getMaxLevel optional: function to get the maximum level this controller ever got
 * @returns whether {@link Structure.isActive}
 */
export declare function isStructureActive(getMaxLevel?: (controller: StructureController) => number): (s: Structure) => boolean;
export declare namespace isStructureActive {
    var update: () => void;
}