class Github::API

def _hash_traverse(hash, &block)
  hash.each do |key, val|
    block.call(key)
    case val
    when Hash
      val.keys.each do |k|
        _hash_traverse(val, &block)
      end
    when Array
      val.each do |item|
        _hash_traverse(item, &block)
      end
    end
  end
  return hash
end