def number(col, comparator, number, args, block)
        comparator = '==' if comparator == '='
        operation = "[value] #{comparator} #{number}"
        pivot["#{comparator}#{number}"] = { col: col, operation: operation }
      end
def number(col, comparator, number, args, block)
        comparator = '==' if comparator == '='
        operation = "[value] #{comparator} #{number}"
        pivot["#{comparator}#{number}"] = { col: col, operation: operation }
      end
Adds a number filter