module Hashie::Extensions::StringifyKeys

to strings.
Return a new hash with all keys converted

def stringify_keys
  StringifyKeys.stringify_keys(self)
end

test # => {'abc' => 'def'}
test.stringify_keys!
test = {:abc => 'def'}
@example

Convert all keys in the hash to strings.

def stringify_keys!
  StringifyKeys.stringify_keys!(self)
  self
end