code: def testNeg(self):
      a = t2a(tf.convert_to_tensor(value=[1.0, 2.0]))
      self.assertAllEqual([-1.0, -2.0], -a)
  
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 3 for calling the ArrayTest obj's underlying member method code with example usage: obj.testNeg() without return types