code: def setup(self, constructor, window_size, dtype, method):
      N = 10**5
      arr = np.random.random(N).astype(dtype)
      indexer = pd.api.indexers.FixedForwardWindowIndexer(
          window_size=window_size
      )
      self.roll = getattr(pd, constructor)(arr).rolling(window=indexer)
  
imports: import warnings
  import numpy
  import pandas
  from .pandas_vb_common import setup
label_desc: Use image node_id 1 for calling the ForwardWindowMethods obj's underlying member method code with example usage: obj.setup(constructor, window_size, dtype, method) without return types