Returns checkpoint associated with the item at position of caret, or nil if this item does not have associated checkpoint.
function GetCurrentCheckpoint: TCheckPointData;
This method must be called only when the document is formatted.
See also methods:
▪SetCurrentCheckpointInfo (changes checkpoint of item at the position of caret, as an editing operation);
▪GetItemCheckpoint (returns checkpoint of the specified item).
See also properties: