def checksum=(new_val)
      return if new_val == @checksum
      raise JSS::InvalidDataError, 'Checksum must be a String or nil' unless new_val.is_a?(String) || new_val.nil?

      @checksum = new_val
      @need_to_update = true
    end
def checksum=(new_val)
      return if new_val == @checksum
      raise JSS::InvalidDataError, 'Checksum must be a String or nil' unless new_val.is_a?(String) || new_val.nil?

      @checksum = new_val
      @need_to_update = true
    end
Change the  checksum type

 @param new_val[String]

 @return [void]