Do minor improvements in CommandMessage and SplittablePayload

Author: stIncMale

driver-core/src/main/com/mongodb/internal/connection/CommandMessage.java

@@ -286,7 +286,7 @@ private List<BsonElement> getExtraElements(final OperationContext operationConte
                 throw new MongoClientException("Attempting to use a ClientSession while connected to a server that doesn't support "
                         + "sessions");
             }
-            if (getSettings().isSessionSupported() && responseExpected) {
+            if (getSettings().isSessionSupported() && requireOpMsgResponse()) {
                 extraElements.add(new BsonElement("lsid", sessionContext.getSessionId()));
             }
         }

driver-core/src/main/com/mongodb/internal/connection/SplittablePayload.java

@@ -117,7 +117,7 @@ public String getPayloadName() {
     }
 
     boolean hasPayload() {
-        return writeRequestWithIndexes.size() > 0;
+        return !writeRequestWithIndexes.isEmpty();
     }
 
     public int size() {
@@ -137,10 +137,6 @@ public List<BsonDocument> getPayload() {
                     .collect(Collectors.toList());
     }
 
-    public List<WriteRequestWithIndex> getWriteRequestWithIndexes() {
-        return writeRequestWithIndexes;
-    }
-
     /**
      * @return the current position in the payload
      */