static FromJSON(json){
            let ctrl = new ScheduleControl2();
            let j = JSON.parse(json);
            for(let client of j.Data){
                let cC = ctrl.AddClientFromModel(client);
                ctrl._selectedClient = cC.dataset.id;
                 for(let i = 0; i < 7; i++){
                     for(let j = 0; j < 48; j++){
                         let val = client.availability.data[i][j];
                         if(val == 0){
                            continue;
                         }
                         ctrl._addClientToShift(ctrl._selectedClient,i,j);
                     }
                 }
            }
            return ctrl;
       }
       ToJSON(){
         let data = {Data:[]};
         let clients = [];
         for(let client of this.ClientsElm.childNodes){
             client = client.childNodes[0];
             let c = {};
             c.name = client.dataset.name;
             c.address = client.dataset.address;
             c.shifts = parseInt(client.dataset.shifts);
             c.color = client.dataset.color;
             c.availability = {data:[[],[],[],[],[],[],[]]};
             for(let i = 0; i < 7; i++){
                 for(let j = 0; j < 48; j++){
                     c.availability.data[i][j] = 0;
                 }
             }
             c._id = client.dataset.id;
             let shifts = this.Grid.querySelectorAll(`[data-id='${c._id}']`);
             for(let shift of shifts){
                 c.availability.data[shift.dataset.day][shift.dataset.shift] = 1;
             }
             clients.push(c);
         }
         data.Data = clients;