def shallow_update(other_hash)
      other_hash.each_pair do |k, v|
        regular_writer(convert_key(k), convert_value(v, true))
      end
      self
    end
def shallow_update(other_hash)
      other_hash.each_pair do |k, v|
        regular_writer(convert_key(k), convert_value(v, true))
      end
      self
    end
Merges (non-recursively) the hash from the argument,
 changing the receiving hash