getItemText function
Get text of an item.
Implementation
String? getItemText(
JsonMap item,
int index, {
int runIndex = 0,
bool noneIfAbsent = false,
}) {
final column = getFlexColumnItem(item, index);
if (column == null) return null;
final runs = (column['text'] as JsonMap)['runs'] as List;
if (noneIfAbsent && runs.length < runIndex + 1) return null;
return (runs[runIndex] as JsonMap)['text'] as String;
}