Function: getCommentLinkId()
ts
function getCommentLinkId(arrow): Id | undefined;Get the id of the comment an arrow is connected to, if any.
A comment is one visual annotation together with the arrow that connects it - callers that raise a comment's z-order (e.g. bringing a newly created/selected comment to the front) should raise this arrow along with it, not just the comment bubble.
Parameters
arrow
The arrow feature to check
Returns
Id | undefined
The linked comment's id, or undefined if the arrow isn't attached to a comment