[Phanx]

You should generally avoid modifying addon files directly. The only reason to do so would be if the function you need to modify is declared as a local, and cannot be accessed from outside the file.

hooksecurefunc(GridFrame, "RegisterFrame", function(frame)
	CreateBorderLight(frame, LeUI.media.bordersize, LeUI.bordercolor, LeUI.bordercolor, LeUI.bordercolor, 2)
end