code: def l2_distance(self, vector):
      return self._distance("<->", vector)
  
file_path: pgvector-python/pgvector/peewee/__init__.py
imports: from peewee import Expression, Field, Value
  from ..utils import from_db, to_db
label_desc: Use image node_id 6 for calling the VectorField obj's underlying member method code with example usage: obj.l2_distance(vector) and returns: self