/// <summary>
/// Map method
/// </summary>
/// <param name="courseView">courseView instance</param>
/// <returns>Course instance (for BLL)</returns>
public static Course Map(this CourseView courseView)
{
var resultCourse = courseView.MapFlat();
resultCourse.Theme = courseView.Theme.Map();
resultCourse.Students = courseView.Students.Select(x => x.MapFlat()).ToList();
resultCourse.Teacher = courseView.teacher.MapFlat();
return resultCourse;
}