title: Is it possible to customise rules for SonarCloud (not SonarQube)
body: <p>I'm wondering if it is possible to add a custom rule or modify an existing rule - as mentioned in <a href="https://docs.sonarqube.org/display/DEV/Adding+Coding+Rules" rel="nofollow noreferrer">https://docs.sonarqube.org/display/DEV/Adding+Coding+Rules</a> - to our SonarCloud instance.</p>
  <p>We've setup SonarCloud on a couple of private projects and I want to - for instance - modify rule 'php:S1068 - Unused private fields should be removed&quot;. In the framework that we're using, a private field with the name of &quot;$db&quot; shouldn't be marked as 'unused', because that framework uses that variable through reflection.</p>
  <p>Is it possible to add/modify such rules in SonarCloud?</p>