Revert "update class_attribute"

This reverts commit 96d1ecfe2998b4977f4f2fcce2768c33463793ad.
Revert "update class_attribute"

This reverts commit 78d1027a98a159c6055ce605415ab663457a59d2.
Revert "update class_attribute"

This reverts commit 99486b8e0a3c5dcdc216c12e6a6f9e5d00f6a794.
Revert "update class_attribute"

This reverts commit db2034e4055a1f84fef3a28c073b3f48576e223f.
Revert "update class_attribute"

This reverts commit 23bf97d9f70a27a62c19c92891c2c83b12918de1.