anchor.diff:  |`tags` |Attributes or names of backing technologies behind the service.
   |`label` |The service offering’s name (not to be confused with a service _instance’s_ name).
   |`credentials.uri` |A URI pertaining to the service instance.
  -|`credentials.uris` |URIs pertaining to the service instance.
   |===========================================================================================================================================================================
   
   If they are present, it will also consider the following fields:
  
positive.code: 
  The connector will check for:
  
  * `uri` or `uris` using the scheme `oracle`
  * `jdbcUrl` field in `credentials` using the subprotocol `oracle` in the JDBC URL
  * `oracleUri`, `oracleuri`, `oracleUrl`, or `oracleurl` fields in `credentials`
  
  
negative.code: 
  * `tags` including `mysql`
  * `label` beginning with the `mysql` tag
  * `uri` using the scheme `mysql`
  * `jdbcUrl` field in `credentials` using the subprotocol `mysql` in the JDBC URL
  * `mysqlUri`, `mysqluri`, `mysqlUrl`, or `mysqlurl` fields in `credentials`
  
  