loadDefault Source Code

[stimits]

This is probably a naive question, but on 16.11.04 I am searching for the 
actual code which runs for the "loadDefault" part of:
./gradlew loadDefault
 
I'm looking for what I might edit to create my own version of loadDefault after 
observing what the existing loadDefault actually executes. I see some shell 
scripts passing this on, and suspect this is part of one of the jar files, but 
was unable to find the actual code.
 
Thanks!