code: def _filter(self, xp, scp, x):
      filter = scp.ndimage.binary_propagation
      structure = scp.ndimage.generate_binary_structure(
          x.ndim, self.connectivity
      )
      mask = xp.asarray(self.mask)
      return filter(
          x,
          structure,
          mask=mask,
          output=self.output,
          border_value=self.border_value,
          origin=self.origin,
      )
  
imports: import numpy
  import pytest
  from cupy import testing
  import cupyx.scipy.ndimage
label_desc: Use image node_id 1 for calling the TestBinaryPropagation obj's underlying member method code with example usage: obj._filter(xp, scp, x) and returns: filter