public void setEvictionPolicy(String policy) {
    haEvictionPolicy = policy;
  }
This class represents the data given for binding an overflow mechanism to a client subscription.
It encapsulates eviction policy, capacity and overflowDirectory. This object will get created for
every <b>client-subscription</b> tag

@since GemFire 5.7
geode-core/src/main/java/org/apache/geode/internal/cache/xmlcache/ClientHaQueueCreation.java