         )
     }
 
+    /**
+     Returns quarter `[qtr]` mass unit.
+     
+     - author: Michal Konturek
+     */
     public static var quarter: MassUnit {
         return MassUnit(
             name: "quarter",


public extension MassUnit {

    public static var ton: MassUnit {
        return MassUnit(
            name: "ton",

        )
    }

    /**
     Returns pound `[lb]` mass unit.
     
     - author: Michal Konturek
     */
    public static var pound: MassUnit {
        return MassUnit(
            name: "pound",
