Equivalent to DevSrf

Hi, I have just started using Rhino 6. Been using Rhino 5 for a few years now.

I am just wondering if there is an equivalent command in Rhino 6 to DevSrf in Rhino 5.
And if so, is there any learning material to go with it?



There’s DevLoft.

As for learning material, does the help file help?

Thanks for the reply!