presto-parser/src/main/java/io/prestosql/sql/SqlFormatter.java/Formatter/visitDropView
class Formatter:        @Override
        protected Void visitDropView(DropView node, Integer context)
        {
            builder.append("DROP VIEW ");
            if (node.isExists()) {
                builder.append("IF EXISTS ");
            }
            builder.append(node.getName());

            return null;
        }