float32 field1_a # 1.2
float32 field1_b # 3.4
float32 field1_c # 5.6
float32 field1_d # 7.8
SimpleMigrated field2_a # 11
SimpleMigrated field2_b # 22
SimpleMigrated field2_c # 33
SimpleMigrated field2_d # 44