@Override
@Command
public String[] getDataRange(long[] fromTo) throws Exception {
Preconditions.checkArgument(fromTo.length == 2, "Two elements are expected here: 0 - from timestamp; 1 - to timestamp");
Preconditions.checkArgument(Longs.compare(fromTo[0], fromTo[1]) < 0, "'from' should be less than 'to'!");
Timestamp from = new Timestamp(fromTo[0]);
Timestamp to = new Timestamp(fromTo[1]);
RequestContext ctx = getContext();
Multimap<AttributeName, AttributeValue<?>> values = engine.getValuesRange(from, to, ctx.attributesGroup);