height property Null safety
The minimum height of the strut, as a multiple of fontSize.
When height is omitted or null, then the strut's height will be the sum of the strut's font-defined ascent, its font-defined descent, and its leading. The font's combined ascent and descent may be taller or shorter than the fontSize.
When height is provided, the line's EM-square ascent and descent (which
sums to fontSize) will be scaled by height to achieve a final strut
fontSize * height + fontSize * leading logical pixels. The
following diagram illustrates the differences between the font metrics
defined height and the EM-square height:
See TextStyle.height, which works in a similar manner.
The default height is null.
final double? height;