def set_ds_field value
      return if ds_field_value == value

      if Troles::Common::Config.log_on?
        puts "Troles::Common::Storage.set_ds_field:"
        puts "#{rolegroup_subject}.#{ds_field_name} = #{value}"
      end

      role_subject.send(:"#{ds_field_name}=", value)
      persist_role_changes!
    end
def set_ds_field value
      return if ds_field_value == value

      if Troles::Common::Config.log_on?
        puts "Troles::Common::Storage.set_ds_field:"
        puts "#{rolegroup_subject}.#{ds_field_name} = #{value}"
      end

      role_subject.send(:"#{ds_field_name}=", value)
      persist_role_changes!
    end
sets the value of the role field (@trole or @troles) and persists the value (in the data store)
 @param [Object] the value to set on the role field of the role subject