def add_defaults_local
      super
      self.capacity ||= Capacity.new.add_defaults
      self.row_label ||= capacity.rows && capacity.rows > 0 ? 'Row' : 'Unused'
      self.column_label ||= capacity.columns && capacity.columns > 0 ? 'Column' : 'Unused'
    end
def add_defaults_local
      super
      self.capacity ||= Capacity.new.add_defaults
      self.row_label ||= capacity.rows && capacity.rows > 0 ? 'Row' : 'Unused'
      self.column_label ||= capacity.columns && capacity.columns > 0 ? 'Column' : 'Unused'
    end
Adds an empty capacity and default dimension labels, if necessary.
 The default +one_dimension_label+ is 'Column' if there is a non-zero dimension capacity, 'Unused' otherwise.
 The default +two_dimension_label+ is 'Row' if there is a non-zero dimension capacity, 'Unused' otherwise.

 @quirk JRuby See {#merge_container_type_attributes}. Work-around is that each ContainerType
   subclass must alias +add_defaults_local+ to this method.