//// [foo.js]
/**
 * @typedef {{
 *   [id: string]: [Function, Function];
 * }} ResolveRejectMap
 */ let id = 0;
/**
 * @param {ResolveRejectMap} handlers
 * @returns {Promise<any>}
 */ const send = (handlers)=>new Promise((resolve, reject)=>{
        handlers[++id] = [
            resolve,
            reject
        ];
    });
