code: def _is_sunder(name):
      """Returns True if a _sunder_ name, False otherwise."""
      return (
          name[0] == name[-1] == "_"
          and name[1:2] != "_"
          and name[-2:-1] != "_"
          and len(name) > 2
      )
  
imports: import sys
label_desc: Use image node_id 3 for calling a global function with example usage: _is_sunder(name) and returns: unknown