base/common/src/main/com/thesett/common/error/MultipleUserErrorException.java
public void addErrorMessage(String key, String userMessage)
    {
        /*log.fine("addErrorMessage(String key, String userMessage): called");*/
        /*log.fine("userMessage = " + userMessage);*/

        errors.add(new UserReadableErrorImpl(key, userMessage));
    }
public void addErrorMessage(String key, String userMessage)
    {
        /*log.fine("addErrorMessage(String key, String userMessage): called");*/
        /*log.fine("userMessage = " + userMessage);*/

        errors.add(new UserReadableErrorImpl(key, userMessage));
    }
Adds another user readable error message to this exception.

@param key         A key to look up user readable messages with.
@param userMessage The user readable message or data string.