code: def decompose(self):
      return self.tensors, self.mask
  
imports: import paddle
  import paddle.nn
  import paddle.nn.functional
  from scipy.optimize import linear_sum_assignment
  from paddlepanseg.cvlibs import manager, build_info_dict
  from paddlepanseg.core.runner import PanSegRunner
label_desc: Use image node_id 2 for calling the NestedTensor obj's underlying member method code with example usage: obj.decompose() and returns: self,  self