How can I generate trpc Generic Types?

I am building a trpc library, and as part of my implementation, I need the generic types of

t.mergeRouters

t.mergeRouters

t.procedure

t.procedure

t.router

t.router

and

t.middleware

t.middleware

.

I've haven't been able to locate those generic types in the

@trpc/server

@trpc/server

and since trpc has such a complex type structure, would love to see an implementation for a generic set of types for the ones listed about.