@SuppressWarnings("unused")
  public float getEvictionHeapPercentage() {
    return cache.getEvictionHeapPercentage();
  }
This is called by Tomcat to set properties on the Listener.

@param name the name of the property to set
@param value the value to set the property to
extensions/geode-modules/src/main/java/org/apache/geode/modules/session/catalina/AbstractCacheLifecycleListener.java