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TPS7A8101: question for footprint of tps7a8101

Part Number: TPS7A8101

most of footprints supported by you are different from before,the tps7a8101 footprint downloaded and is translated by ultralibrarian,but i doubt that polyregion of top layer and top paste can be or not defined as one net ,gnd for example,or maybe deleted when used.otherwise,i wanna know the use of the action of adding polyregion both on top layer and on top paste.