code: public int[] getIntVec(String key)
      {
          int[] vec = NativeLight.getIntVec(getNative(), key);
          if (vec == null)
              throw new IllegalArgumentException("key " + key + " not found in light");
          return vec;
      }
docs: Get the value for an integer uniform vector.
  @param key name of uniform to get.
  @return int array with value of named uniform.
  @throws IllegalArgumentException if key is not in uniform descriptor.