// v1/index.d.ts

declare module 'v1/index' {
    /**
     * Convert "letter + number" to "Pinyin tone"
     * @param args - A string, e.g., "ma1 ma2 ma3 ma4 ma"
     * @returns Returns the Pinyin with tones, e.g., "mā má mǎ mà ma"
     */
    export default function pinyin_v1(args: string): string;
}