handwritten code in the auto-generated files, you should write them in independent files

[J404J]

First of all, thank you for writing such a great project.
Here is a suggestion:
If there is handwritten code in the auto-generated files, you should write them in files similar to xxx_ex.go.
For example, the GetName method in the sys_cron_group.go file should be written in a new sys_cron_group_ex.go file.