String[] cols = colSet.toArray(new String[colSet.size()]);
columns.put(
Column.TIME_COLUMN_NAME, new ColumnBuilder()
.setType(ValueType.LONG)
.setGenericColumn(new LongGenericColumnSupplier(index.timestamps))
.build()
);
return new SimpleQueryableIndex(
index.getDataInterval(),
new ArrayIndexed<>(cols, String.class),