ViewBlockFillerMode

typedef

Enum representing the type of the block filler.

Possible values:

br – For the <br data-cke-filler="true"> block filler used in the editing view.
nbsp – For the   block fillers used in the data.
markedNbsp – For the   block fillers wrapped in <span> elements: <span data-cke-filler="true"> </span> used in the data.

See source