code: def convert_to_float2_array(x_complex, dtype=np.float32):
      real = np.real(x_complex)
      imag = np.imag(x_complex)
      real_s = real.reshape((real.shape) + (1,))
      imag_s = imag.reshape((imag.shape) + (1,))
      x_float2 = np.concatenate(
          [real_s, imag_s], axis=len(real_s.shape) - 1
      )
      return x_float2.astype(dtype)
  
imports: from nnabla.utils import nnabla_pb2
  from six.moves import filter
  import copy
  import nnabla
  import nnabla.ext_utils
  import nnabla.functions
  import nnabla.utils.converter
  import nnabla.dtypes
  from nnabla.testing import assert_allclose
  import numpy
  import numpy
  import platform
label_desc: Use image node_id 20 for calling a global function with example usage: convert_to_float2_array(x_complex, dtype) and returns: x_float2