docs: public List<InputType> getLayerActivationTypes(@NonNull InputType inputType) {
          List<InputType> out = new ArrayList<>();
          int nLayers = confs.size();
          for (int i = 0; i < nLayers; i++) {
              InputPreProcessor preproc = getInputPreProcess(i);
              if (preproc != null) {
                  inputType = preproc.getOutputType(inputType);
              }
  
              inputType = confs.get(i).getLayer().getOutputType(i, inputType);
              out.add(inputType);
          }
          return out;
      }