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java.lang.NoClassDefFoundError: com/google/common/base/Optional	at com.atlassian.connector.commons.jira.JIRAIssueBean.(JIRAIssueBean.java:453)	at com.atlassian.connector.commons.jira.rest.JiraRestSessionImpl$21.call(JiraRestSessionImpl.java:505)	at com.atlassian.connector.commons.jira.rest.JiraRestSessionImpl$21.call(JiraRestSessionImpl.java:501)	at com.atlassian.connector.commons.jira.rest.JiraRestSessionImpl.wrapWithJiraException(JiraRestSessionImpl.java:655)	at com.atlassian.connector.commons.jira.rest.JiraRestSessionImpl.getIssue(JiraRestSessionImpl.java:501)	at com.atlassian.connector.commons.jira.JiraRESTFacade2Impl.getIssue(JiraRESTFacade2Impl.java:238)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:597)	at com.atlassian.connector.commons.jira.JIRAServerFacade2Impl$1.invoke(JIRAServerFacade2Impl.java:91)	at $Proxy32.getIssue(Unknown Source)	at com.atlassian.connector.commons.jira.JIRAServerFacade2Impl.getIssue(JIRAServerFacade2Impl.java:224)	at com.atlassian.theplugin.commons.jira.IntelliJJiraServerFacade.getIssue(IntelliJJiraServerFacade.java:193)