class_docstr: prefix similarity
      
code: def similarity(self, *sequences: Sequence) -> int:
      return len(self(*sequences))
  
imports: from __future__ import annotations
  from itertools import takewhile
  from typing import Sequence
  from .base import Base, BaseSimilarity
  from .types import SimFunc
label_desc: Use image node_id 3 for calling the Prefix obj's underlying member method code with example usage: obj.similarity() and returns: len