com.github.dockerjava.api.model.PullResponseItem#isPullSuccessIndicated fails to check for "Exists" status #2010

com.github.dockerjava.api.model.PullResponseItem#isPullSuccessIndicated checks for several success states, but misses "Exists" and treats this status as a failure.

Caused by: com.github.dockerjava.api.exception.DockerClientException: Could not pull image: Exists

If would be great if the success status codes could be a configurable list that the library user could append to.