@Override
  public boolean containsKeyOnServer(Object key) {
    return proxy.containsKeyOnServer(key);
  }
Asif: This method should not be used for multiple partitioned regions based join queries We do
not support equijoin queries on PartitionedRegions unless they are colocated and the the
colocated columns ACTUALLY EXIST IN WHERE CLAUSE , AND IN CASE OF MULTI COLUMN PARTITIONING ,
SHOULD HAVE AND CLAUSE.

If not , this method will return wrong results. We DO NOT DETECT COLOCATION CRITERIA IN THE
MULTI REGION PR BASED QUERIES.
geode-core/src/main/java/org/apache/geode/internal/cache/LocalDataSet.java