public static Throwable getThrowableCandidate(final Object[] argArray) {
        return NormalizedParameters.getThrowableCandidate(argArray);
    }
Helper method to determine if an {@link Object} array contains a {@link Throwable} as last element

@param argArray
         The arguments off which we want to know if it contains a {@link Throwable} as last element
@return if the last {@link Object} in argArray is a {@link Throwable} this method will return it,
         otherwise it returns null
slf4j-api/src/main/java/org/slf4j/helpers/MessageFormatter.java