shape method
Implementation
TextShapeResult shape(String text, List<TextRun> runs) {
if (_fallbackFontsEnabled != _fallbackFontsActuallyEnabled) {
if (_fallbackFontsEnabled) {
enableFallbackFonts();
} else {
disableFallbackFonts();
}
_fallbackFontsActuallyEnabled = _fallbackFontsEnabled;
}
return computeShape(text, runs);
}