presto-parser/src/main/java/io/prestosql/sql/SqlFormatter.java/SqlFormatter/visitShowGrants
class SqlFormatter:        @Override
        public Void visitShowGrants(ShowGrants node, Integer indent)
        {
            builder.append("SHOW GRANTS ");

            if (node.getTableName().isPresent()) {
                builder.append("ON ");

                if (node.getTable()) {
                    builder.append("TABLE ");
                }
                builder.append(node.getTableName().get());
            }

            return null;
        }