class_docstr: Lexer for DNS zone file
  
  .. versionadded:: 2.16
class_docstr_tok: ["Lexer","for","DNS","zone","file","..","versionadded",":",":","2.16"]
code: def analyse_text(text):
      return text.startswith("$ORIGIN")
  
imports: import re
  from pygments.token import Comment, Operator, Keyword, Name, String, Number, Punctuation, Whitespace, Literal
  from pygments.lexer import RegexLexer, bygroups, include
label_desc: Use image node_id 1 for calling the DnsZoneLexer obj's underlying member method code with example usage: obj.analyse_text(text) and returns: text