def comparable(number1, number2)
      assert_type number1, :Number, :number1
      assert_type number2, :Number, :number2
      bool(number1.comparable_to?(number2))
    end
def comparable(number1, number2)
      assert_type number1, :Number, :number1
      assert_type number2, :Number, :number2
      bool(number1.comparable_to?(number2))
    end
Returns whether two numbers can added, subtracted, or compared.

 @example
   comparable(2px, 1px) => true
   comparable(100px, 3em) => false
   comparable(10cm, 3mm) => true
 @overload comparable($number1, $number2)
   @param $number1 [Sass::Script::Value::Number]
   @param $number2 [Sass::Script::Value::Number]
 @return [Sass::Script::Value::Bool]
 @raise [ArgumentError] if either parameter is the wrong type