rename_key

# File activesupport/lib/active_support/xml_mini.rb, line 128
    def rename_key(key, options = {})
      camelize  = options.has_key?(:camelize) && options[:camelize]
      dasherize = !options.has_key?(:dasherize) || options[:dasherize]
      key = key.camelize  if camelize
      key = _dasherize(key) if dasherize
      key
    end