code: def prelim_text(self):
      return "\n".join([b.prelim_text for b in self.blocks])
  
imports: from collections import Counter
  from typing import List, Optional, Tuple
  from pydantic import BaseModel, field_validator
  import ftfy
  from marker.bbox import boxes_intersect_pct, multiple_boxes_intersect
  from marker.settings import settings
label_desc: Use image node_id 9 for calling the Page obj's underlying member method code with example usage: obj.prelim_text() and returns: str