class_docstr: A lexer for BibTeX bibliography data format.
  
  .. versionadded:: 2.2
code: def open_brace_callback(self, match, ctx):
      opening_brace = match.group()
      ctx.opening_brace = opening_brace
      yield match.start(), Punctuation, opening_brace
      ctx.pos = match.end()
  
file_path: wandb/wandb/vendor/pygments/lexers/bibtex.py
imports: import re
  from pygments.lexer import RegexLexer, ExtendedRegexLexer, include, default, words
  from pygments.token import Name, Comment, String, Error, Number, Text, Keyword, Punctuation
label_desc: Use image node_id 1 for calling the BibTeXLexer obj's underlying member method code with example usage: obj.open_brace_callback(match, ctx) without return types