code: def time_rolling_multiindex_creation(self):
      self.df.groupby("A").rolling(3).mean()
  
imports: import warnings
  import numpy
  import pandas
  from .pandas_vb_common import setup
label_desc: Use image node_id 2 for calling the GroupbyLargeGroups obj's underlying member method code with example usage: obj.time_rolling_multiindex_creation() without return types