docs: public static void unmap(final FileChannel fileChannel, final long address, final long length)
      {
          try
          {
              MappingMethods.UNMAP_ADDRESS.invoke(fileChannel, address, length);
          }
          catch (final IllegalAccessException | InvocationTargetException ex)
          {
              LangUtil.rethrowUnchecked(ex);
          }
      }