code: public final @NotNull S isNotSameAs(@Nullable A other) {
      failIfSame(customErrorMessage(), rawDescription(), actual, other);
      return myself();
    }
docs: Verifies that the actual value is not the same as the given one.
  
  @param other the given value to compare the actual value to.
  @return this assertion object.
  @throws AssertionError if the actual value is the same as the given one.