+ hideColumns(inserts, 0, inserts.length() - 1);
+ }
+
+ /**
+ * Hide columns corresponding to the marked bits, within the range
+ * [start,end]. Entries in tohide which are outside [start,end] are ignored.
+ *
+ * @param tohide
+ * columns mapped to bits starting from zero
+ * @param start
+ * start of range to hide columns within
+ * @param end
+ * end of range to hide columns within
+ */
+ private void hideColumns(BitSet tohide, int start, int end)
+ {