[BYOC] how to check BYOC result?

I tried BYOC followed Bring Your Own Codegen To TVM — tvm 0.13.dev0 documentation ,and registered function to TVM backend. But how do I check this result and generate C code as example?

I use

f1 = tvm.get_global_func(“relay.ext.ccompiler”)

and it runs normally, but how do I run function f1 and generate C code?

Thank you!