class_docstr: Lexer for `YAML <http://yaml.org/>`_, a human-friendly data serialization
  language.
  
  .. versionadded:: 0.11
code: def get_tokens_unprocessed(self, text=None, context=None):
      if context is None:
          context = YamlLexerContext(text, 0)
      return super(YamlLexer, self).get_tokens_unprocessed(
          text, context
      )
  
imports: import re
  from pygments.lexer import RegexLexer, ExtendedRegexLexer, LexerContext, include, bygroups, inherit
  from pygments.token import Text, Comment, Keyword, Name, String, Number, Punctuation, Literal, Error
label_desc: Use image node_id 9 for calling the YamlLexer obj's underlying member method code with example usage: obj.get_tokens_unprocessed(text, context) and returns: super