/**
 * A type-safe way to define properties.
 * https://www.typescriptlang.org/docs/handbook/mixins.html#alternative-pattern
 * @param target Object on which to add or modify properties
 * @param mixin Object with additional properties
 * @example
 * class CreepMixin extends Creep {
 *   hasBodyparts(type: BodyPartConstant) {
 *     return this.body.some((b) => b.type == type)
 *   }
 * }
 * applyMixin(Creep, CreepMixin)
 */
export declare function applyMixin<T, M extends T>(target: ProtoObject<T>, mixin: ProtoObject<M>): void;
interface ProtoObject<T> {
    prototype: T;
}
export {};