Revert "simplify prerender wrapper structure."
Revert "simplify prerender wrapper structure."

This reverts commit 4e1cfcca42a224467d8f4944c33626232fc2f23a.

Conflicts:
	tdi/model_adapters.py

ndparker/tdi,ndparker/tdi,ndparker/tdi,ndparker/tdi,ndparker/tdi