code: public static <Type> Validator<Type> negate(@NonNull final Context context,
                                                  @NonNull final Validator<Type> validator) {
          return NegateValidator.create(context, R.string.default_error_message, validator);
      }
docs: Creates and returns a validator, which allows to negate the result of an other validator.
  
  @param <Type>
  The type of the values, which should be validated
  @param context
  The context, which should be used to retrieve the error message, as an instance of
  the class {@link Context}. The context may not be null
  @param validator
  The validator, whose result should be negated, as an instance of the type {@link
  Validator}. The validator may not be null
  @return The validator, which has been created, as an instance of the type {@link Validator}