Topmost interactive object under the cursor, reported in HoverInfo.
Lets hosts build context menus, tooltips, or hover highlights without
re-running their own hit-tests. id is the object's stable identifier:
drawing — the Drawing.id (random string assigned on creation).
primitive — the Primitive.id (host-supplied, e.g. 'priceline:0').
marker — reserved for a future marker hit-test (not yet emitted).
Topmost interactive object under the cursor, reported in HoverInfo. Lets hosts build context menus, tooltips, or hover highlights without re-running their own hit-tests.
idis the object's stable identifier:drawing— theDrawing.id(random string assigned on creation).primitive— thePrimitive.id(host-supplied, e.g.'priceline:0').marker— reserved for a future marker hit-test (not yet emitted).