Missing dependency 'class javax.annotation.Nullable'

I was trying to use the jira-rest-java-client provided by Atlassian in a Scala program I am developing. I am using Eclipse as my IDE.

When I have an object of type Issue and I try to look at the properties I see there are far fewer properties than are declared in the Java code.

I thought perhaps this was just Eclipse not finding all properties/methods of an object so I tried putting Issue.getSummary() and doing an sbt compile. The compile showed me this error:

Missing dependency 'class javax.annotation.Nullable'

Any ideas?