code: def testDtype(self):
      a = t2a(tf.zeros(shape=[1, 2], dtype=tf.int64))
      self.assertIs(a.dtype.type, np.int64)
      self.assertAllEqual(0, a.dtype.type(0))
  
imports: from collections import abc
  import numpy
  import tensorflow.compat.v2
  from trax.tf_numpy.numpy_impl import arrays
  from trax.tf_numpy.numpy_impl import math_ops
label_desc: Use image node_id 1 for calling the ArrayTest obj's underlying member method code with example usage: obj.testDtype() without return types