presto-main/src/main/java/io/prestosql/metadata/InternalNode.java/InternalNode/toString
class InternalNode:    @Override
    public String toString()
    {
        return toStringHelper(this)
                .add("nodeIdentifier", nodeIdentifier)
                .add("internalUri", internalUri)
                .add("nodeVersion", nodeVersion)
                .toString();
    }