⬆️ text-buffer@3.7.0 for checkpoints

Also add methods on TextEditor to expose the new checkpoint
functionality

src/text-editor.coffee

@@ -1126,6 +1126,32 @@ class TextEditor extends Model
   # within the transaction.
   abortTransaction: -> @buffer.abortTransaction()
 
+  # Experimental: Create a pointer to the current state of the buffer for use
+  # with {::revertToCheckpoint} and {::groupChangesSinceCheckpoint}.
+  #
+  # Returns a checkpoint value.
+  createCheckpoint: -> @buffer.createCheckpoint()
+
+  # Experimental: Revert the buffer to the state it was in when the given
+  # checkpoint was created.
+  #
+  # The redo stack will be empty following this operation, so changes since the
+  # checkpoint will be lost. If the given checkpoint is no longer present in the
+  # undo history, no changes will be made to the buffer and this method will
+  # return `false`.
+  #
+  # Returns a {Boolean} indicating whether the operation succeeded.
+  revertToCheckpoint: (checkpoint) -> @buffer.revertToCheckpoint(checkpoint)
+
+  # Experimental: Group all changes since the given checkpoint into a single
+  # transaction for purposes of undo/redo.
+  #
+  # If the given checkpoint is no longer present in the undo history, no
+  # grouping will be performed and this method will return `false`.
+  #
+  # Returns a {Boolean} indicating whether the operation succeeded.
+  groupChangesSinceCheckpoint: (checkpoint) -> @buffer.groupChangesSinceCheckpoint(checkpoint)
+
   ###
   Section: TextEditor Coordinates
   ###