TCPClient classname from TCP config not applied

Hello!

 

I wrote my own TCPClient class, it successfully working when I fill
"TCPClient classname" field in separate TCP Samplers. But it is not applied
when I fill the same field in TCP Sampler Config in test plan. All other
options from config (hostname, port, etc) works fine, but classname is not.

 

Is that a feature, known or unknown bug?

 

Thanks,

Andrey