Is the pure java client thread-safe?

public static void main(String[] args) {
         TeamPlatform.startup();
         login(monitor);
         //spawn multiple threads now, which get hold of the repository service TeamPlatform.getTeamRepositoryService().getTeamRepository(...)
         // and do various operations such as updating work items, creating new ones, downloading attachments etc
         //the main thread waits until the spawned threads die, and then does a TeamPlatform.shutdown();
 }