class org.apache.commons.collections.map.UnmodifiableMap (implements org.apache.commons.collections.IterableMap, org.apache.commons.collections.Unmodifiable)
class org.apache.commons.collections.map.CompositeMap (implements java.util.Map)
class org.apache.commons.collections.map.Flat3Map (implements org.apache.commons.collections.IterableMap)
class org.apache.commons.collections.map.StaticBucketMap (implements java.util.Map)