code: def time_laplacian(self, n, format, normed):
      laplacian(self.A, normed=normed)
  
imports: import numpy
  import scipy.sparse
  from .common import Benchmark, safe_import
label_desc: Use image node_id 2 for calling the Laplacian obj's underlying member method code with example usage: obj.time_laplacian(n, format, normed) without return types