A single edit operation, that acts as a simple replace.
i.e. Replace text at
text in model.
This indicates that this operation has "insert" semantics.
i.e. forceMoveMarkers = true => if
range is collapsed, all markers at the position will be moved.
The range to replace. This can be empty to emulate a simple insert.
The text to replace with. This can be null to emulate a simple delete.