refreshIndentFolds method
Recomputes indent folds and keeps collapse state that still applies.
Implementation
void refreshIndentFolds({int tabWidth = 4}) {
folds = folds.retain(
computeIndentFolds([
for (var i = 0; i < lineCount; i++) _document.lineAt(i),
], tabWidth: tabWidth),
);
if (!_moveHiddenCursorsToFoldHeaders()) _syncCoreState();
}