code: def _isrecursive(pattern):
      if isinstance(pattern, bytes):  # pragma: no cover
          return pattern == b"**"
      else:
          return pattern == "**"
  
file_path: mars/mars/lib/filesystem/_glob.py
imports: import fnmatch
  import os
  import re
  from .core import FileSystem
label_desc: Use image node_id 3 for calling a global function with example usage: _isrecursive(pattern) and returns: unknown, unknown