presto-main/src/main/java/io/prestosql/sql/planner/iterative/rule/ExpressionRewriteRuleSet.java/ExpressionRewriteRuleSet/joinExpressionRewrite
class ExpressionRewriteRuleSet:    public Rule<?> joinExpressionRewrite()
    {
        return new JoinExpressionRewrite(rewriter);
    }