Method isEmpty

src/main/java/org/mapdb/BTreeMapJava.java:88–91

(GroupSerializer keySerializer)

        }

        boolean isEmpty(GroupSerializer keySerializer){
            int keySize = keySerializer.valueArraySize(keys);
            return !isLastKeyDouble() && keySize == 2-intLeftEdge()-intRightEdge();
        }

        @Nullable
        public <K> K highKey(GroupSerializer<K> keySerializer) {