void (@NotNull AnActionEvent e) { Project project = e.getRequiredData(CommonDataKeys.PROJECT); if (ChangeListManager.getInstance(project).isFreezedWithNotification(null)) return; ListSelection<Change> selection = e.getRequiredData(VcsDataKeys.CHANGES_SELECTION); DiffRequestChain chain = new WithLocalRequestChain(project, selection, myUseBeforeVersion); DiffManager.getInstance().showDiff(project, chain, DiffDialogHints.DEFAULT); }