def getIconURL():
    """ Get the absolute URL of the icon for the object.

        o This method is used in the 'folder_contents' view to generate an
          appropriate icon for the items found in the folder.

        o If the content item does not define an attribute named "icon"
          return a "default" icon path (e.g., ``/misc_/dtmldoc.gif``, which is
          the icon used for DTML Documents).

        o Permission:  Public
        """
