public void put(Object key, Object value) throws TimeoutException, CacheWriterException {
    region.put(key, value);
  }
Getter for property modifiable. Since a QRegion as a collection represents an unmodifiable
facade on the values of this region, return false.

@return Value of property modifiable.
geode-core/src/main/java/org/apache/geode/cache/query/internal/QRegion.java