presto-main/src/main/java/io/prestosql/execution/QueryPreparer.java/PreparedQuery/PreparedQuery
class PreparedQuery:        public PreparedQuery(Statement statement, List<Expression> parameters, Optional<String> prepareSql)
        {
            this.statement = requireNonNull(statement, "statement is null");
            this.parameters = ImmutableList.copyOf(requireNonNull(parameters, "parameters is null"));
            this.prepareSql = requireNonNull(prepareSql, "prepareSql is null");
        }