code: @VisibleForTesting
      boolean onMinLevel(int k) {
          float kAsFloat = k;
          int exponent = Math.getExponent(kAsFloat);
          return exponent % 2 == 0;
      }
docs: Return true if on a minimum level, false otherwise.
  
  @param k
  the element
  @return true if on a minimum level, false otherwise