class_docstr: Collect data by size and step.
class_docstr_tok: ["Collect","data","by","size","and","step","."]
code: def data(self):
      return self._buffer
  
file_path: towhee/towhee/runtime/nodes/_window.py
imports: from typing import List
  from towhee.runtime.constants import WindowConst
  from ._window_base import WindowBase
label_desc: Use image node_id 3 for calling the _WindowBuffer obj's underlying member method code with example usage: obj.data() and returns: self