snaker-core/src/main/java/org/snaker/engine/core/TaskService.java
public Task complete(String taskId, String operator) {
		return complete(taskId, operator, null);
	}
public Task complete(String taskId, String operator) {
		return complete(taskId, operator, null);
	}
public Task complete ( String taskId , String operator ) { return complete ( taskId , operator , null ) ; }
完成指定任务
完成指定任务