presto-geospatial-toolkit/src/main/java/io/prestosql/geospatial/KdbTree.java/Node/equals
class Node:        @Override
        public boolean equals(Object obj)
        {
            if (obj == null) {
                return false;
            }

            if (!(obj instanceof Node)) {
                return false;
            }

            Node other = (Node) obj;
            return this.extent.equals(other.extent)
                    && Objects.equals(this.leafId, other.leafId)
                    && Objects.equals(this.left, other.left)
                    && Objects.equals(this.right, other.right);
        }