code: def get_line_start_stats(self):
      starts = [l.bbox[0] for l in self.get_nonblank_lines()]
      start_counts = Counter(starts)
      return start_counts
  
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 7 for calling the Page obj's underlying member method code with example usage: obj.get_line_start_stats() and returns: start_counts