code: def time_upfirdn1d(self, up, down):
      for h, x in self.pairs:
          signal.upfirdn(h, x, up=up, down=down)
  
imports: from itertools import product
  import numpy
  from .common import Benchmark, safe_import
label_desc: Use image node_id 2 for calling the Upfirdn1D obj's underlying member method code with example usage: obj.time_upfirdn1d(up, down) without return types