Problem to find the right JIRA Java SDK version

[1] I am having a hard time finding the right JIRA SDK version. I want this StatusCategory class, but I do not find the right jar file containing it.

https://docs.atlassian.com/DAC/javadoc/jira/reference/com/atlassian/jira/issue/status/category/StatusCategory.html

[2] I downloaded the Atlassian JIRA SDK according to their description, but I do not find the jar file in there. Maybe I looked wrong?

https://marketplace.atlassian.com/apps/1210950/atlassian-plugin-sdk-windows/version-history

[3] I also tried to find the JAR file using mvnrespository.com, but no luck, all dependencies are scoped with provided.

https://mvnrepository.com/artifact/com.atlassian.jira/jira-api

[4] Previously, I used an old version of the JIRA API, which worked, but it does not contain the StatusCategory class, which I want.

<!-- https://mvnrepository.com/artifact/com.atlassian.jira/jira-rest-java-client-core --><dependency><groupId>com.atlassian.jira</groupId><artifactId>jira-rest-java-client-core</artifactId><version>5.1.6</version></dependency><!-- https://mvnrepository.com/artifact/com.atlassian.jira/jira-rest-java-client-api --><dependency><groupId>com.atlassian.jira</groupId><artifactId>jira-rest-java-client-api</artifactId><version>5.1.6</version></dependency><!-- https://mvnrepository.com/artifact/io.atlassian.fugue/fugue --><dependency><groupId>io.atlassian.fugue</groupId><artifactId>fugue</artifactId><version>4.7.2</version></dependency>

Am I the only person who finds this whole JIRA Java SDK thing kind of messy ;-)?