Test
data T a b
data T2 a b
data T3 a b
data T4 a b
data T5 a b
data T6
data N1 a
data N2 a b
data N3 a b
data N4 a b
data N5 a b
data N6 a b
data N7 a b
data R
data R1
class C a
class D a
class E a
class F a
f
hidden
data Ex a
k
l
m
f'
withType
withoutType