docs: public static final Class<?> getPrimitiveClass(Class<?> clazz)
      {
          Class<?> retValue = clazz;
          if (clazz == java.lang.Long.class)
          {
              retValue = Long.TYPE;
          } else if (clazz == java.lang.Integer.class)
          {
              retValue = Integer.TYPE;
          } else if (clazz == java.lang.Boolean.class)
          {
              retValue = Boolean.TYPE;
          } else if (clazz == java.lang.Short.class)
          {
              retValue = Short.TYPE;
          } else if (clazz == java.lang.Byte.class)
          {
              retValue = Byte.TYPE;
          } else if (clazz == java.lang.Character.class)
          {
              retValue = Character.TYPE;
          } else if (clazz == java.lang.Double.class)
          {
              retValue = Double.TYPE;
          } else if (clazz == java.lang.Float.class)
          {
              retValue = Float.TYPE;
          }
          return retValue;
      }