code: def determine_shapes(self):
      num_seg = 1
      k = list(self._data.keys())[0]
      if os.path.isfile(self._data[k]["data_file"][:-4] + ".npy"):
          case_all_data = np.load(
              self._data[k]["data_file"][:-4] + ".npy", self.memmap_mode
          )
      else:
          case_all_data = np.load(self._data[k]["data_file"])["data"]
      num_color_channels = case_all_data.shape[0] - num_seg
      data_shape = (
          self.batch_size,
          num_color_channels,
          *self.patch_size,
      )
      seg_shape = (self.batch_size, num_seg, *self.patch_size)
      return data_shape, seg_shape
  
imports: import os
  import pickle
  import numpy
  from collections import OrderedDict
  from abc import abstractmethod
label_desc: Use image node_id 2 for calling the DataLoader2D obj's underlying member method code with example usage: obj.determine_shapes() and returns: data_shape,  seg_shape