var (
// ErrExpTestA is an error for tests. ErrExpTestA = fmt.Errorf("exp_test_error_A")
// ErrExpTestB is an errors for tests. ErrExpTestB = fmt.Errorf("exp_test_error_B")
// ErrExpTestС is an errors for tests. ErrExpTestC = fmt.Errorf("exp_test_error_С")
)