public static void mustNotBeEmpty(String paramName, String paramValue)
            throws TikaConfigException {
        if (StringUtils.isBlank(paramValue)) {
            throw new IllegalArgumentException(
                    "parameter '" + paramName + "' must be set in the config file");
        }
    }
Return an InitializableProblemHandler by name.

@param initializableProblemHandler can be empty, 'ignore', 'info', 'warn' or 'throw', but never null.
@return an InitializableProblemHandler
@throws TikaConfigException if invalid name
tika-core/src/main/java/org/apache/tika/config/TikaConfig.java