The interface of an item that can be displayed in the documentation popup.
Returns an action that opens the item's source representation in the editor
or null
if the item has no source representation.
Returns a HTML text dispaleyd in the documentation popup.
Returns a URL of the item's external representation that can be displayed
in an external browser or null
if the item has no external
representation.
Returns a documentation item representing an object linked from the item's HTML text.