code: def min_inputs(self):
      return 7
  
imports: import nnabla
  import nnabla.function
  import nnabla.functions
  from nnabla.function import PythonFunction
  from .batch_normalization import double_backward_for_batch
  from .batch_normalization import double_backward_for_global
  from .utils import no_grad
label_desc: Use image node_id 7 for calling the FusedBatchNormalizationBackward obj's underlying member method code with example usage: obj.min_inputs() and returns: int