public static String getString(String v, String defaultMissing) {
        if (v == null) {
            return defaultMissing;
        }
        return v;
    }
Parses v.  If v is null, this returns defaultMissing.

@param v              string to parse
@param defaultMissing value to return if value is null
@return parsed value
tika-batch/src/main/java/org/apache/tika/util/PropsUtil.java