code: def is_viable(self) -> bool:
      if self.name == "_SAVE_RETURN_OFFSET":
          return True  # Adjusts next_instr, but only in tier 1 code
      if self.properties.needs_this:
          return False
      if "INSTRUMENTED" in self.name:
          return False
      if "replaced" in self.annotations:
          return False
      if self.name in ("INTERPRETER_EXIT", "JUMP_BACKWARD"):
          return False
      if len([c for c in self.caches if c.name != "unused"]) > 1:
          return False
      return True
  
imports: from dataclasses import dataclass, field
  import lexer
  import parser
  from typing import Optional
label_desc: Use image node_id 3 for calling the Uop obj's underlying member method code with example usage: obj.is_viable() and returns: True, True, False, False, False, False, False