addItem method
Implementation
void addItem(People item){
this.items.insert(1, item);
itemsTile.insert(1, ItemTile(index: 1, object: item, onClick: this.onItemClick));
}
void addItem(People item){
this.items.insert(1, item);
itemsTile.insert(1, ItemTile(index: 1, object: item, onClick: this.onItemClick));
}