code: @Nullable
    public static String getClassPackageName (@Nullable final Object aObject)
    {
      return aObject == null ? null : getClassPackageName (aObject.getClass ());
    }
docs: Get the name of the package the passed object resides in.
  
  @param aObject
  The class to get the information from. May be <code>null</code>.
  @return The package name of the passed object.