return new Promise((function(resolve, reject){
var project = param.project;
var url = Request.getBackendAPI(`project/${project.id}`);
Request.deleteData(url).then((function(res){
this.refresh();
}).bind(this));
resolve();
}).bind(this));
return new Promise((function(resolve, reject){
var task = param.task;
var url = Request.getBackendAPI(`task/${task.id}`);
Request.deleteData(url).then((function(res){
this.refresh();
}).bind(this));
resolve();
}).bind(this));