+
+ private BitSet bsVisible;
+
+ @Override
+ public BitSet getHiddenBitSet()
+ {
+ return hidden.getBitset();
+ }
+
+ /**
+ * return ALL columns, not just the truly visible ones
+ */
+ @Override
+ public BitSet getOverviewBitSet()
+ {
+ if (bsVisible == null)
+ {
+ bsVisible = new BitSet(end + 1);
+ bsVisible.set(0, end + 1);
+ }
+ return bsVisible;
+ }