code: def _is_deep_feature_sarray(sa):
      if not isinstance(sa, _tc.SArray):
          return False
      if sa.dtype != list:
          return False
      if not isinstance(sa[0][0], _np.ndarray):
          return False
      if sa[0][0].dtype != _np.float64:
          return False
      if len(sa[0][0]) != 12288:
          return False
      return True
  
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  import logging
  from math import ceil
  import numpy
  import six
  import turicreate
  import turicreate.toolkits._internal_utils
  from turicreate.toolkits._main import ToolkitError
  from turicreate.toolkits._model import CustomModel
  from turicreate.toolkits._model import PythonProxy
  from turicreate.toolkits import _coreml_utils
  from turicreate._deps.minimal_package import _minimal_package_import_check
label_desc: Use image node_id 3 for calling a global function with example usage: _is_deep_feature_sarray(sa) and returns: True, False, False, False, False, False