code: def is_dense(array_type):
      return not Test.is_sparse(array_type) and not Test.is_base(
          array_type
      )
  
imports: import unittest
  import numpy
  from numpy.linalg import norm
  from tick.array_test.build import array_test
  from scipy.sparse import csr_matrix
  import itertools
label_desc: Use image node_id 5 for calling the Test obj's underlying member method code with example usage: obj.is_dense(array_type) and returns: unknown