async loadConfigArrayForDirectory(dirPath) {
		assertValidFilePath(dirPath);

		debug(`[Legacy]: Calculating config for ${dirPath}`);

		const { configFilePath, basePath } =
			await this.#locateConfigFileToUse();

		debug(
			`[Legacy]: Using config file ${configFilePath} and base path ${basePath}`,
		);
		return this.#calculateConfigArray(configFilePath, basePath);
	}
Returns a configuration object for the given file based on the CLI options.
This is the same logic used by the ESLint CLI executable to determine
configuration for each file it processes.
@param {string} dirPath The path of the directory to retrieve config for.
@returns {Promise<FlatConfigArray>} A configuration object for the file.