public IEnumerable<Department> get_departments_in(Department department)
{
return catalog.get_departments_in(department);
}
public IEnumerable<Product> get_products_in(Department department)
{
return catalog.get_products_in(department);
}
public IEnumerable<Department> get_the_departments_in(Department parent_department)
{
return departments.get_the_departments_in(parent_department);
}
