Scala warning during REST server compilation

[WARNING] /home/vjuranek/ws-idea/infinispan/server/rest/src/main/scala/org/infinispan/rest/RestCacheManager.scala:59: warning: abstract type V in type pattern org.infinispan.container.entries.InternalCacheEntry[String,V] is unchecked since it is eliminated by erasure
[INFO]          case ice: InternalCacheEntry[String, V] => ice
[INFO]                    ^
[WARNING] /home/vjuranek/ws-idea/infinispan/server/rest/src/main/scala/org/infinispan/rest/RestCacheManager.scala:61: warning: abstract type V in type pattern org.infinispan.container.entries.MVCCEntry[String,V] is unchecked since it is eliminated by erasure
[INFO]          case mvcc: MVCCEntry[String, V] => cache.getCacheEntry(key)  // FIXME: horrible re-get to be fixed by ISPN-3460
[INFO]                     ^
[WARNING] /home/vjuranek/ws-idea/infinispan/server/rest/src/main/scala/org/infinispan/rest/Server.scala:101: warning: abstract type V in type pattern org.infinispan.container.entries.InternalCacheEntry[String,V] is unchecked since it is eliminated by erasure
[INFO]             case ice: InternalCacheEntry[String, V] => {
[INFO]                       ^
[WARNING] /home/vjuranek/ws-idea/infinispan/server/rest/src/main/scala/org/infinispan/rest/Server.scala:312: warning: abstract type V in type pattern org.infinispan.container.entries.InternalCacheEntry[String,V] is unchecked since it is eliminated by erasure
[INFO]             case ice: InternalCacheEntry[String, V] => {
[INFO]                       ^
[WARNING] /home/vjuranek/ws-idea/infinispan/server/rest/src/main/scala/org/infinispan/rest/Server.scala:360: warning: abstract type V in type pattern org.infinispan.container.entries.InternalCacheEntry[String,V] is unchecked since it is eliminated by erasure
[INFO]                case ice: InternalCacheEntry[String, V] => {
[INFO]                          ^
[WARNING] /home/vjuranek/ws-idea/infinispan/server/rest/src/main/scala/org/infinispan/rest/Server.scala:445: warning: abstract type V in type pattern org.infinispan.container.entries.InternalCacheEntry[String,V] is unchecked since it is eliminated by erasure
[INFO]             case ice: InternalCacheEntry[String, V] => {
[INFO]                       ^
[WARNING] 6 warnings found