code: func (engine *Engine) ClearCache(beans ...interface{}) error {
  	for _, bean := range beans {
  		tableName := engine.TableName(bean)
  		cacher := engine.getCacher(tableName)
  		if cacher != nil {
  			cacher.ClearIds(tableName)
  			cacher.ClearBeans(tableName)
  		}
  	}
  	return nil
  }
docs: // ClearCache if enabled cache, clear some tables' cache