FEATURE: Add CompletableFuture BTree insert/get API

Author: oliviarla

src/main/java/net/spy/memcached/ArcusClient.java

@@ -3243,6 +3243,10 @@ private CollectionOperationStatus toCollectionOperationStatus(OperationStatus st
     }
   }
 
+  public Transcoder<Object> getCollectionTranscoder() {
+    return collectionTranscoder;
+  }
+
   /**
    * Get the client version.
    *

src/main/java/net/spy/memcached/collection/BTreeSMGetWithByteTypeBkey.java

@@ -31,7 +31,7 @@ public BTreeSMGetWithByteTypeBkey(MemcachedNode node, List<String> keyList,
         eFlagFilter, count, unique);
   }
 
-  private BTreeSMGetWithByteTypeBkey(MemcachedNode node, List<String> keyList,
+  public BTreeSMGetWithByteTypeBkey(MemcachedNode node, List<String> keyList,
                                      String range,
                                      ElementFlagFilter eFlagFilter,
                                      int count, boolean unique) {

src/main/java/net/spy/memcached/collection/BTreeSMGetWithLongTypeBkey.java

@@ -29,7 +29,7 @@ public BTreeSMGetWithLongTypeBkey(MemcachedNode node, List<String> keyList,
     super(node, keyList, from + ".." + to, eFlagFilter, count, unique);
   }
 
-  private BTreeSMGetWithLongTypeBkey(MemcachedNode node, List<String> keyList,
+  public BTreeSMGetWithLongTypeBkey(MemcachedNode node, List<String> keyList,
                                      String range,
                                      ElementFlagFilter eFlagFilter,
                                      int count, boolean unique) {