class_docstr: Lexer for Snowball source code.
  
  .. versionadded:: 2.2
class_docstr_tok: ["Lexer","for","Snowball","source","code",".","..","versionadded",":",":","2.2"]
code: def _stringescapes(lexer, match, ctx):
      lexer._start = match.group(3)
      lexer._end = match.group(5)
      return bygroups(
          Keyword.Reserved,
          Whitespace,
          String.Escape,
          Whitespace,
          String.Escape,
      )(lexer, match, ctx)
  
imports: import re
  from pygments.lexer import ExtendedRegexLexer, RegexLexer, bygroups, words, include, default, this, using, combined
  from pygments.token import Text, Comment, Operator, Keyword, Name, String, Number, Punctuation, Whitespace
label_desc: Use image node_id 4 for calling the SnowballLexer obj's underlying member method code with example usage: obj._stringescapes(lexer, match, ctx) and returns: bygroups