code: def set_empty_symbol(self):
          
          self.field_name = None
          self.annotations = None
          self.ion_type = None
          self.set_pending_symbol(CodePointArray())
          return self
docs: Resets the context, retaining the fields that make it a child of its container (``container``, ``queue``,
          ``depth``, ``whence``), and sets an empty ``pending_symbol``.
  
          This is useful when an empty quoted symbol immediately follows a long string.