Boolean (int start, int end, int index) { if (start == end) return null; FoldedGroupState range = getCachedState(start, end, index); if (range == null) return null; if (range.collapsed != null && range.collapsed.contains(start, end)) return false; if (range.expanded != null && range.expanded.contains(start, end)) return true; assert false : "Invalid LineRange" + range.expanded + ", " + range.collapsed + ", " + new LineRange(start, end); return null; }