How to access the payload when implementing the validator interface?

问题

I have to validate the incoming json payload and throw custom errors if the json is not valid. I tried implementing the validator interface as shown in the above image. But how should I access the payload now?In earlier versions the method accepted a mule event through which we could easily get the payload:

public interface Validator
{

    /**
     * Performs the validation and generates a
     * {@link ValidationResult} back.
     *
     * @param event the current {@link MuleEvent}
     * @return a {@link ValidationResult}
     */
    ValidationResult validate(MuleEvent event);
}

来源：https://stackoverflow.com/questions/59529130/how-to-access-the-payload-when-implementing-the-validator-interface