code: public static TheHashinator
          constructHashinator(
                  Class<? extends TheHashinator> hashinatorImplementation,
                  byte configBytes[], boolean cooked) {
          try {
              Constructor<? extends TheHashinator> constructor =
                      hashinatorImplementation.getConstructor(byte[].class, boolean.class);
              return constructor.newInstance(configBytes, cooked);
          } catch (Exception e) {
              Throwables.propagate(e);
          }
          return null;
      }
docs: Helper method to do the reflection boilerplate to call the constructor
  of the selected hashinator and convert the exceptions to runtime exceptions.
  @param hashinatorImplementation  hashinator class
  @param configBytes  config data (raw or cooked)
  @param cooked  true if configBytes is cooked, i.e. in wire serialization format
  @return  the constructed hashinator