def fetch_stash(locale, name)
      value = stash.read(locale, name)
      return value if value
      return nil
    end
def fetch_stash(locale, name)
      value = stash.read(locale, name)
      return value if value
      return nil
    end
Initialises new instance of +Adapter+. Creates empty stash for storing
 translates.
 Param: translatable Class
 Returns value of attribute from stash for given locale.
 Param: String or Symbol - name of locale
 Param: String or Symbol - name of attribute
 Returns nil if no value finded