has(runtime) {
		switch (this._mode) {
			case 0:
				return false;
			case 1:
				return runtimeEqual(this._singleRuntime, runtime);
			default:
				return /** @type {RuntimeSpecMapInnerMap<R>} */ (this._map).has(
					getRuntimeKey(runtime)
				);
		}
	}
@param {RuntimeSpec} runtime the runtimes
@returns {boolean} true, when the runtime is stored