使用该对象的属性来决定是显示还是隐藏Portlet
Use attributes of that object to decide if a portlet should be shown or hidden
display属性设置为none以隐藏控件，设置为block时则会显示列表。
The display property is set to none to hide the control and to block to display the list.
display属性设置为none以隐藏控件，设置为block时则会显示列表。
The display property is set to none to hide the control and to block to display the list.
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