class_docstr: 2D images, axcodes specifications are ignored when
  loading. (Resampling to new pixdims is currently not supported).
class_docstr_tok: ["2D","images",",","axcodes","specifications","are","ignored","when","loading",".","(","Resampling","to","new","pixdims","is","currently","not","supported",")","."]
code: def _load_single_file(cls, file_path, loader, dtype=np.float32):
      image_obj = load_image_obj(file_path, loader)
      image_data = image_obj.get_data()  # new API: get_fdata()
      image_data = misc.expand_to_5d(image_data)
      return image_data.astype(dtype)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  from abc import ABCMeta, abstractmethod
  import nibabel
  import numpy
  import tensorflow
  from six import with_metaclass, string_types
  import niftynet.io.misc_io
  from niftynet.io.image_loader import load_image_obj
  from niftynet.io.misc_io import resolve_file_name, dtype_casting
  from niftynet.utilities.niftynet_global_config import NiftyNetGlobalConfig
label_desc: Use image node_id 16 for calling the SpatialImage2D obj's underlying member method code with example usage: obj._load_single_file(cls, file_path, loader, dtype) and returns: image_data