Implementation for the IDragAndDropService to be used from
EditorSite's.
Adds a drop target to the given control that merges the site's
drop behaviour with that specified by the addMergedDropTarget call.
The current implementation is only defined for EditorSite's and merges the
given drop handling with the existing EditorSashContainer's behaviour.
NOTE: There is no cleanup (i.e. 'dispose') handling necessary for merged
Drop Targets but the hooks are put into place to maintain the consistency
of the implementation pattern.
since:
3.3 | 