code: def _expand(m, iso, coeff):
      params = np.zeros(len(m))
      params[m == 0] = coeff[iso:]
      params = np.concatenate([coeff[:iso], params])
      return params
  
imports: import warnings
  from dipy.reconst.mcsd import mask_for_response_msmt, response_from_mask_msmt, auto_response_msmt
  from dipy.reconst.mcsd import MultiShellDeconvModel, multi_shell_fiber_response
  import numpy
  import numpy.testing
  import pytest
  from dipy.sims.voxel import single_tensor, multi_tensor, add_noise
  from dipy.reconst import shm
  from dipy.data import default_sphere, get_3shell_gtab
  from dipy.core.gradients import GradientTable
  from dipy.testing.decorators import set_random_number_generator
  from dipy.utils.optpkg import optional_package
label_desc: Use image node_id 2 for calling a global function with example usage: _expand(m, iso, coeff) and returns: params