contentValidator.registerValidator(RELATIVE_TO, new ModelTypeValidator(ModelType.STRING, true));
// content additions
contentValidator.registerValidator(INPUT_STREAM_INDEX, new ModelTypeValidator(ModelType.INT, true));
contentValidator.registerValidator(BYTES, new ModelTypeValidator(ModelType.BYTES, true));
contentValidator.registerValidator(URL, new StringLengthValidator(1, true));
this.validator.registerValidator(CONTENT, chain(new ListValidator(new ParametersOfValidator(contentValidator)),
new AbstractParameterValidator() {
@Override
public void validateParameter(String parameterName, ModelNode value) throws OperationFailedException {
validateOnePieceOfContent(value);
}