     @undoStack.push operation
     return operation
   else
-    console.log 'wasn\'t in tree', node
 
 Editor::spliceIn = (node, location) ->
   container = location.container ? location.parent


    # Signify that we are now dragging a block.
    @draggingBlock = @clickedBlock
    console.log 'set to', @draggingBlock, @inTree(@draggingBlock), @clickedBlock, @inTree(@clickedBlock)

    # Our dragging offset must be computed using the canvas on which this block
    # is rendered.

    head = head.prev

  if head.type is 'newline'
    @spliceOut new model.List head, tail

# UNDO STACK SUPPORT
