code: def get_series():
      """
      Generates a set of 4 practice SeriesAxis axes with different starting times/lengths/time steps and units
  
      Yields
      ------
      SeriesAxis axis
      """
      yield axes.SeriesAxis(3, 10, 4)
      yield axes.SeriesAxis(8, 10, 3)
      yield axes.SeriesAxis(3, 2, 4)
      yield axes.SeriesAxis(5, 10, 5, "HERTZ")
  
file_path: nibabel/nibabel/cifti2/tests/test_axes.py
imports: from copy import deepcopy
  import numpy
  import pytest
  import nibabel.cifti2.cifti2_axes
  from .test_cifti2io_axes import check_rewrite
label_desc: Use image node_id 5 for calling a global function with example usage: get_series() without return types