Same as .produce[F]().use(f)

Unsafely substitute the root extracting Functoid.

Note, because the plan has been calculated ahead of time with A as the root, it's not possible to request additional components via Functoid that weren't already in the graph as dependencies of A – everything that A doesn't depend is not in the plan.

Example:

val submodule = new ModuleDef {
  make[Int].fromValue(3)
  make[Int].named("five").from((_: Int) + 2)
  make[String].fromValue("x")
}

makeSubcontext[Int].named("five").withSubmodule(submodule)

...

(subcontext: Subcontext[Int])
  .unsafeModify(_ => Functoid.identity[String])
  .produceRun(println(_))
  // error: `String` is not available

A binding for String is defined in the submodule, but is not referenced by Int @Id("five") binding. Therefore it was removed by garbage collection and cannot be extracted with this Subcontext. You'd have to create another Subcontext[String] with the same submodule to create String:

makeSubcontext[String](submodule)

...

(subcontext: Subcontext[String])
  .produceRun(println(_))
  // x

If you DO need dynamic replanning, you'll need to use nested injection directly.