Content-Type: text/html
Content-Length: 268

Object uid: 0x2ad224adaac0
Same uid: 0x2ad224adaac0
String uid: 0x2ad224acc8b0
Same uid: 0x2ad224acc8b0
Object b:
v2 = 2
v1 = 1
another3 = =3=
Hash a:
v1 = 1
v2 = 2
v3 = 3
another3 = =3=
copy
source must have hash representation
v1
element can not be stored to string