code: public static <S, N extends Node, E extends Event> void installFallback(InputMapTemplate<S, E> imt, S target, Function<? super S, ? extends N> getNode) {
          Nodes.addFallbackInputMap(getNode.apply(target), imt.instantiate(target));
      }
docs: Instantiates the input map and installs it into the node via {@link Nodes#addFallbackInputMap(Node, InputMap)}