transformers

73a9bc37 - Replace Optional and Union typing with | in some source files (#42294)

Replace Optional and Union typing with | in some source files (#42294) * Replace Optional and Union typing with | in some source files Signed-off-by: Yuanyuan Chen <cyyever@outlook.com> * Replace Optional and Union typing with | in some source files Signed-off-by: Yuanyuan Chen <cyyever@outlook.com> * Replace Optional and Union typing with | in some source files Signed-off-by: Yuanyuan Chen <cyyever@outlook.com> * More fixes Signed-off-by: Yuanyuan Chen <cyyever@outlook.com> --------- Signed-off-by: Yuanyuan Chen <cyyever@outlook.com>