def reject(&blk)
      if block_given?
        Thresholds.new(@thresholds.reject(&blk))
      else
        Thresholds.new(@thresholds.reject)
      end
    end
def reject(&blk)
      if block_given?
        Thresholds.new(@thresholds.reject(&blk))
      else
        Thresholds.new(@thresholds.reject)
      end
    end
Returns a new Threshold Object