Add abstract method visit(queryVisitor)

Author: iverase

src/main/perf/RandomQuery.java

@@ -23,6 +23,7 @@
 import org.apache.lucene.search.DocIdSetIterator;
 import org.apache.lucene.search.IndexSearcher;
 import org.apache.lucene.search.Query;
+import org.apache.lucene.search.QueryVisitor;
 import org.apache.lucene.search.ScoreMode;
 import org.apache.lucene.search.Scorer;
 import org.apache.lucene.search.Weight;
@@ -95,6 +96,9 @@ public boolean isCacheable(LeafReaderContext ctx) {
     };
   }
 
+  public void visit(QueryVisitor visitor) {
+  }
+
   @Override
   public String toString(String field) {
     return "RandomQuery(fractionKeep=" + fractionKeep + ")";