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List<ProcessDefinition> definitions = repositoryService.createProcessDefinitionQuery().processDefinitionKey(processDefinitionKey).list();
		Map<String, String> keys = new HashMap<String, String>();
		for (ProcessDefinition processDefinition : definitions) {
			ProcessDefinitionEntity processDefinitionEntity = (ProcessDefinitionEntity) ((RepositoryServiceImpl) repositoryService).getDeployedProcessDefinition(processDefinition.getId());
			List<ActivityImpl> activitiList = processDefinitionEntity.getActivities();

			for (ActivityImpl activity : activitiList) {
				ActivityBehavior activityBehavior = activity.getActivityBehavior();
				if (activityBehavior instanceof UserTaskActivityBehavior) {
					UserTaskActivityBehavior userTaskActivityBehavior = (UserTaskActivityBehavior) activityBehavior;
					TaskDefinition taskDefinition = userTaskActivityBehavior.getTaskDefinition();
					keys.put(taskDefinition.getKey(), taskDefinition.getNameExpression().toString());
				}
			}
		}