public async Task <ActionResult <Page <TodoItem> > > GetTodoItems(Filter filter, string sort, PageData pageData)
{
var entityFilter = _mapper.Map <TodoItemFilter>(filter);
var sortOrder = TodoItem.GetSortExpression(sort);
var itemEntities = await _service.Find(entityFilter, sortOrder, pageData.Page, pageData.PageSize);
var items = _mapper.Map <Page <TodoItem> >(itemEntities);
return(Ok(items));
}