anchor.diff:  
   * `tags` including `redis`
   * `label` beginning with the `redis` tag
  -* `uri` or `uris` using the scheme `redis`
  +* `uri` using the scheme `redis`
   * `redisUri`, `redisuri`, `redisUrl`, or `redisurl` fields in `credentials`
   
   ==== SMTP
  
positive.code: 
  * `tags` including `mysql`
  * `label` beginning with the `mysql` tag
  * `uri` or `uris` using the scheme `mysql`
  * `jdbcUrl` field in `credentials` using the subprotocol `mysql` in the JDBC URL
  * `mysqlUri`, `mysqluri`, `mysqlUrl`, or `mysqlurl` fields in `credentials`
  
  
negative.code: 
  * `tags` including `postgresql`
  * `label` beginning with the `postgresql` tag
  * `uri` using the scheme `postgres`
  * `jdbcUrl` field in `credentials` using the subprotocol `postgres` in the JDBC URL
  * `postgresUri`, `postgresuri`, `postgresUrl`, or `postgresurl` fields in `credentials`
  
  