docstr: Workflow used to test combined workflows in general.
  
  Parameters
  ----------
  inputs : string
      fake input string param
  param_combined : int
      fake positional param (default 3)
  out_dir : string
      fake output directory (default '')
  out_combined : string
      fake out file (default out_combined.txt)
docstr_tok: ["Workflow","used","to","test","combined","workflows","in","general",".","Parameters","--","--","--","--","--","inputs",":","string","fake","input","string","param","param_combined",":","int","fake","positional","param","(","default","3",")","out_dir",":","string","fake","output","directory","(","default","``",")","out_combined",":","string","fake","out","file","(","default","out_combined.txt",")"]
code: def run(
      self,
      inputs,
      param_combined=3,
      out_dir="",
      out_combined="out_combined.txt",
  ):
      """Workflow used to test combined workflows in general.
  
      Parameters
      ----------
      inputs : string
          fake input string param
      param_combined : int
          fake positional param (default 3)
      out_dir : string
          fake output directory (default '')
      out_combined : string
          fake out file (default out_combined.txt)
      """
      dwf1 = DummyWorkflow1()
      param1 = self.run_sub_flow(dwf1, inputs)
  
      dwf2 = DummyWorkflow2()
      param2 = self.run_sub_flow(dwf2, inputs)
  
      return param1, param2, param_combined
  
imports: from dipy.workflows.workflow import Workflow
  from dipy.workflows.combined_workflow import CombinedWorkflow
label_desc: Use image node_id 2 for calling the DummyCombinedWorkflow obj's underlying member method code with example usage: obj.run(inputs, param_combined, out_dir, out_combined) and returns: param1,  param2,  param_combined