---
Hash (size=2 name='My nested hash'):
  Pair 0:
    Key:
      Symbol (size=1 encoding=US-ASCII): :a
    Value:
      Hash (size=2):
        Pair 0:
          Key:
            Symbol (size=1 encoding=US-ASCII): :b
          Value: Fixnum 0
        Pair 1:
          Key:
            Symbol (size=1 encoding=US-ASCII): :c
          Value: Fixnum 1
  Pair 1:
    Key:
      Symbol (size=1 encoding=US-ASCII): :d
    Value:
      Hash (size=2):
        Pair 0:
          Key:
            Symbol (size=1 encoding=US-ASCII): :e
          Value: Fixnum 2
        Pair 1:
          Key:
            Symbol (size=1 encoding=US-ASCII): :f
          Value: Fixnum 3