def normalize_hash(hash)
      new_hash = {}

      hash.each do |key,value|
        new_hash[key.to_sym] = normalize(value)
      end

      return new_hash
    end
def normalize_hash(hash)
      new_hash = {}

      hash.each do |key,value|
        new_hash[key.to_sym] = normalize(value)
      end

      return new_hash
    end
Converts all the keys of a Hash to Symbols.

 @param [Hash{Object => Object}] hash
   The hash to be converted.

 @return [Hash{Symbol => Object}]
   The normalized Hash.