contentHeight method
Implementation
double contentHeight(highlightIndex) {
double totalHeight = 0;
for (var i = 0; i < metrics.length; i++) {
totalHeight += getLineHeight(i == highlightIndex, i);
if (i < metrics.length - 1) {
totalHeight += style.lineGap;
}
}
return totalHeight + style.contentPadding.vertical;
}