+
+ @Override
+ public boolean hasHidden()
+ {
+ return hidden.hasHiddenColumns();
+ }
+
+ private BitSet bsVisible;
+
+ @Override
+ public BitSet getHiddenBitSet()
+ {
+ return hidden.getBitset();
+ }
+
+ /**
+ * Returns all columns, including any hidden in the alignment
+ */
+ @Override
+ public BitSet getShownBitSet()
+ {
+ if (bsVisible == null)
+ {
+ bsVisible = new BitSet(end + 1);
+ bsVisible.set(0, end + 1);
+ }
+ return bsVisible;
+ }