code: def model_to_pymatbridge(model, variable_name="model", matlab=None):
      
      if scipy_sparse is None:
          raise ImportError("`model_to_pymatbridge` requires scipy!")
      if matlab is None:  # assumed to be running an IPython magic
          from IPython import get_ipython
          matlab = get_ipython().magics_manager.registry["MatlabMagics"].Matlab
      model_info = create_mat_dict(model)
      S = model_info["S"].todok()
      model_info["S"] = 0
      temp_S_name = "cobra_pymatbridge_temp_" + uuid4().hex
      _check(matlab.set_variable(variable_name, model_info))
      _check(matlab.set_variable(temp_S_name, S))
      _check(matlab.run_code("%s.S = %s;" % (variable_name, temp_S_name)))
      # all vectors need to be transposed
      for i in model_info.keys():
          if i == "S":
              continue
          _check(matlab.run_code("{0}.{1} = {0}.{1}';".format(variable_name, i)))
      _check(matlab.run_code("clear %s;" % temp_S_name))
docs: send the model to a MATLAB workspace through pymatbridge
  
      This model can then be manipulated through the COBRA toolbox
  
      Parameters
      ----------
      variable_name : str
          The variable name to which the model will be assigned in the
          MATLAB workspace
  
      matlab : None or pymatbridge.Matlab instance
          The MATLAB workspace to which the variable will be sent. If
          this is None, then this will be sent to the same environment
          used in IPython magics.