docs: public TolerantFloatComparison isWithin(final float tolerance) {
      return new TolerantFloatComparison() {
        @Override
        public void of(float expected) {
          Float actual = actual();
          checkNotNull(
              actual, "actual value cannot be null. tolerance=%s expected=%s", tolerance, expected);
          checkTolerance(tolerance);
  
          if (!equalWithinTolerance(actual, expected, tolerance)) {
            failWithoutActual(
                fact("expected", floatToString(expected)),
                butWas(),
                fact("outside tolerance", floatToString(tolerance)));
          }
        }
      };
    }