Issue
I am using SonarQube 7.9.1. I have Quality Profile containing ~450 active rules for Java code. There are exporters for FindBugs, PMD and Checkstyle in SonarQube, but they are not exporting all available rules. After export ~20 rules are missing. What can be the cause of that?
Example of missing rule: "Unnecessary imports should be removed". It seems strange, because both Checkstyle and PMD have such rule available.
Question
Is it possible to export all rules defined in SonarQube Quality Profile to Checkstyle, PMD and SpotBugs rule files?