class_docstr: For `Lasso <http://www.lassosoft.com/>`_ source code, covering both Lasso 9
  syntax and LassoScript for Lasso 8.6 and earlier. For Lasso embedded in
  HTML, use the `LassoHtmlLexer`.
  
  Additional options accepted:
  
  `builtinshighlighting`
      If given and ``True``, highlight builtin types, traits, methods, and
      members (default: ``True``).
  `requiredelimiters`
      If given and ``True``, only highlight code between delimiters as Lasso
      (default: ``False``).
  
  .. versionadded:: 1.6
code: def analyse_text(text):
      rv = 0.0
      if "bin/lasso9" in text:
          rv += 0.8
      if re.search(r"<\?lasso", text, re.I):
          rv += 0.4
      if re.search(r"local\(", text, re.I):
          rv += 0.4
      return rv
  
imports: import re
  from pygments.lexer import RegexLexer, include, bygroups, default, using, this, words, combined
  from pygments.token import Text, Comment, Operator, Keyword, Name, String, Number, Punctuation, Other
  from pygments.util import get_bool_opt, iteritems
  import pygments.unistring
label_desc: Use image node_id 3 for calling the LassoLexer obj's underlying member method code with example usage: obj.analyse_text(text) and returns: rv