Can we see the existed formatter source code in Katalon Recorder?

Hi there,
I know Katalon recorder provide the sample.js for us to create our own formatter in panel\js\katalon\newformatters\sample.js

Could you tell me where are other existed formatters and can we adjust them directly?

I find a place looks like, but inside them there is no command transformation part.

I guess maybe they are in formatLocal function in testCase class.
import com.kms.katalon.core.testcase.TestCase