presto-parser/src/main/java/io/prestosql/sql/ExpressionFormatter.java/ExpressionFormatter/visitBindExpression
class ExpressionFormatter:        @Override
        protected String visitBindExpression(BindExpression node, Void context)
        {
            StringBuilder builder = new StringBuilder();

            builder.append("\"$INTERNAL$BIND\"(");
            for (Expression value : node.getValues()) {
                builder.append(process(value, context))
                        .append(", ");
            }
            builder.append(process(node.getFunction(), context))
                    .append(")");
            return builder.toString();
        }