docs: public static boolean equal(Number lhs, Number rhs) {
          Class lhsClass = lhs.getClass();
          Class rhsClass = rhs.getClass();
          assert lhsClass != rhsClass;
  
          if (isDoubleRepresentable(lhsClass)) {
              if (isDoubleRepresentable(rhsClass)) {
                  return equalDoubles(lhs.doubleValue(), rhs.doubleValue());
              } else if (isLongRepresentable(rhsClass)) {
                  return equalLongAndDouble(rhs.longValue(), lhs.doubleValue());
              }
          } else if (isLongRepresentable(lhsClass)) {
              if (isDoubleRepresentable(rhsClass)) {
                  return equalLongAndDouble(lhs.longValue(), rhs.doubleValue());
              } else if (isLongRepresentable(rhsClass)) {
                  return lhs.longValue() == rhs.longValue();
              }
          }
  
          return lhs.equals(rhs);
      }