def inspect
      "<#{self.class}:#{@_id}>\n{\n" +
      _all_attributes.map do |attr|
        ivar = ('@' + attr.to_s).to_sym
        if (value = instance_variable_get(ivar)).respond_to?(:is_poxreference?)
          "  #{attr} => <PEROBS::ObjectBase:#{value._id}>"
        else
          "  #{attr} => #{value.inspect}"
        end
      end.join(",\n") +
      "\n}\n"
    end
def inspect
      "<#{self.class}:#{@_id}>\n{\n" +
      _all_attributes.map do |attr|
        ivar = ('@' + attr.to_s).to_sym
        if (value = instance_variable_get(ivar)).respond_to?(:is_poxreference?)
          "  #{attr} => <PEROBS::ObjectBase:#{value._id}>"
        else
          "  #{attr} => #{value.inspect}"
        end
      end.join(",\n") +
      "\n}\n"
    end
Textual dump for debugging purposes
 @return [String]