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    import _ from "lodash";

    //marker对象池
    let markerMgr = {
        _idCounter:0,
        _pool:[],
        _outPool:{},

        _reset(ins){
            var m = this;
        },

        //归还
        reback(ins){
            var m = this;
            m._reset(ins);
            delete m._outPool[ins.$$$id];
            m._pool.push(ins);
        },

        //借取
        pick(){
            var m = this;
            var marker;
            if(!m._pool.length) {
                marker = new AMap.Marker();
                marker.$$$id = m._idCounter++;
            }else{
                marker = m._pool.pop();
            }

            m._outPool[marker.$$$id] = marker;
            return marker;
        },


        //归还所有
        rebackAll(stepCallback){
            var m = this;

            _.each((ins,$id)=>{
                debugger;
                if(stepCallback) {
                    stepCallback(ins);
                }
                m.reback(ins);
            })
        }

    };