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

        )
    }

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

        )
    }

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