Zonemaster::LDNS::RR::TXT - Type TXT record
A subclass of Zonemaster::LDNS::RR, so it has all the methods of
    that class available in addition to the ones documented here.
  - txtdata()
- Returns the concatenation of all the strings composing the data of the
      resource record.
    For example, if a TXT resource record has the following
        presentation format:     txt.test.example. 3600 IN TXT "I " "am " "split up in " "lit" "tle pieces"
    then txtdata() returns the string
        "I am split up in little pieces".