If stacking is turned on, label placement can insert a line break before or after the word that overruns the maximum number of characters per row.
The LabelStackBreakPosition can be one of:
(0) Use the default break position (Enums.LabelStackBreakPositionAfter).
(1) Insert the line break after a word that has broken the stackRowLength limit. This means rows will generally be longer than the LabelDefinition::stackRowLength.
(2) Insert the line break before a word that will break the stackRowLength limit. This means rows will generally be shorter than the LabelDefinition::stackRowLength (although they will overrun for individual words larger than this count).