class RealNumbers<NUMBER extends Number & Comparable<NUMBER>> extends Numbers<NUMBER> {

  protected RealNumbers() {
    super();
  }

  protected RealNumbers(ComparisonStrategy comparisonStrategy) {
    super(comparisonStrategy);
  }

  /**
   * Verifies that the actual value is equal to {@code NaN}.<br>
   * It does not rely on the custom comparisonStrategy (if one is set).
   *
   * @param info contains information about the assertion.
   * @param actual the actual value.
   * @throws AssertionError if the actual value is not equal to {@code NaN}.
   */
  public void assertIsNaN(AssertionInfo info, NUMBER actual) {
    assertEqualByComparison(info, actual, NaN());
  }

  protected BigDecimal absBigDecimalDiff(NUMBER number1, NUMBER number2) {<FILL_FUNCTION_BODY>}

  protected abstract NUMBER NaN();

  /**
   * Verifies that the actual value is not equal to {@code NaN}.
   * @param info contains information about the assertion.
   * @param actual the actual value.
   * @throws AssertionError if the actual value is equal to {@code NaN}.
   */
  public void assertIsNotNaN(AssertionInfo info, NUMBER actual) {
    assertNotEqualByComparison(info, actual, NaN());
  }

  @Override
  protected boolean isGreaterThan(NUMBER value, NUMBER other) {
    return value.compareTo(other) > 0;
  }

  public void assertIsFinite(AssertionInfo info, NUMBER actual) {
    assertNotNull(info, actual);
    if (isFinite(actual)) return;
    throw failures.failure(info, shouldBeFinite(actual));
  }

  protected abstract boolean isFinite(NUMBER value);

  public void assertIsNotFinite(AssertionInfo info, NUMBER actual) {
    assertNotNull(info, actual);
    if (isNotFinite(actual)) return;
    throw failures.failure(info, shouldNotBeFinite(actual));
  }

  protected abstract boolean isNotFinite(NUMBER value);

  public void assertIsInfinite(AssertionInfo info, NUMBER actual) {
    assertNotNull(info, actual);
    if (isInfinite(actual)) return;
    throw failures.failure(info, shouldBeInfinite(actual));
  }

  protected abstract boolean isInfinite(NUMBER value);

  public void assertIsNotInfinite(AssertionInfo info, NUMBER actual) {
    assertNotNull(info, actual);
    if (isNotInfinite(actual)) return;
    throw failures.failure(info, shouldNotBeInfinite(actual));
  }

  /**
   * Returns true is if the given value is Nan or Infinite, false otherwise.
   * 
   * @param value the value to check
   * @return true is if the given value is Nan or Infinite, false otherwise.
   */
  public boolean isNanOrInfinite(NUMBER value) {
    return isNaN(value) || isInfinite(value);
  }

  protected abstract boolean isNaN(NUMBER value);

  protected abstract boolean isNotInfinite(NUMBER value);
}

    BigDecimal number1AsbigDecimal = new BigDecimal(String.valueOf(number1));
    BigDecimal number2AsbigDecimal = new BigDecimal(String.valueOf(number2));
    return number1AsbigDecimal.subtract(number2AsbigDecimal).abs();
  
<methods>public void <init>() ,public void <init>(org.assertj.core.internal.ComparisonStrategy) ,public void assertIsBetween(org.assertj.core.api.AssertionInfo, NUMBER, NUMBER, NUMBER) ,public void assertIsCloseTo(org.assertj.core.api.AssertionInfo, NUMBER, NUMBER, Offset<NUMBER>) ,public void assertIsCloseToPercentage(org.assertj.core.api.AssertionInfo, NUMBER, NUMBER, org.assertj.core.data.Percentage) ,public void assertIsNegative(org.assertj.core.api.AssertionInfo, NUMBER) ,public void assertIsNotCloseTo(org.assertj.core.api.AssertionInfo, NUMBER, NUMBER, Offset<NUMBER>) ,public void assertIsNotCloseToPercentage(org.assertj.core.api.AssertionInfo, NUMBER, NUMBER, org.assertj.core.data.Percentage) ,public void assertIsNotNegative(org.assertj.core.api.AssertionInfo, NUMBER) ,public void assertIsNotPositive(org.assertj.core.api.AssertionInfo, NUMBER) ,public void assertIsNotZero(org.assertj.core.api.AssertionInfo, NUMBER) ,public void assertIsOne(org.assertj.core.api.AssertionInfo, NUMBER) ,public void assertIsPositive(org.assertj.core.api.AssertionInfo, NUMBER) ,public void assertIsStrictlyBetween(org.assertj.core.api.AssertionInfo, NUMBER, NUMBER, NUMBER) ,public void assertIsZero(org.assertj.core.api.AssertionInfo, NUMBER) <variables>