docstr: Workflow used to test the introspective argument parser.
  
  Parameters
  ----------
  positional_str : string
      positional string argument
  positional_bool : bool
      positional bool argument
  positional_int : int
      positional int argument
  positional_float : float
      positional float argument
  optional_str : string, optional
      optional string argument (default 'default')
  optional_bool : bool, optional
      optional bool argument (default False)
  optional_int : int, optional
      optional int argument (default 0)
  optional_float : float, optional
      optional float argument (default 1.0)
  optional_float_2 : float, optional
      optional float argument #2 (default 2.0)
  optional_int_2 : int, optional
      optional int argument #2 (default 5)
  optional_float_3 : float, optional
      optional float argument #3 (default 2.0)
  out_dir : string
      output directory (default '')
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code: def run(
      self,
      positional_str,
      positional_bool,
      positional_int,
      positional_float,
      optional_str="default",
      optional_bool=False,
      optional_int=0,
      optional_float=1.0,
      optional_float_2=2.0,
      optional_int_2=5,
      optional_float_3=2.0,
      out_dir="",
  ):
      """Workflow used to test the introspective argument parser.
  
      Parameters
      ----------
      positional_str : string
          positional string argument
      positional_bool : bool
          positional bool argument
      positional_int : int
          positional int argument
      positional_float : float
          positional float argument
      optional_str : string, optional
          optional string argument (default 'default')
      optional_bool : bool, optional
          optional bool argument (default False)
      optional_int : int, optional
          optional int argument (default 0)
      optional_float : float, optional
          optional float argument (default 1.0)
      optional_float_2 : float, optional
          optional float argument #2 (default 2.0)
      optional_int_2 : int, optional
          optional int argument #2 (default 5)
      optional_float_3 : float, optional
          optional float argument #3 (default 2.0)
      out_dir : string
          output directory (default '')
      """
      return (
          positional_str,
          positional_bool,
          positional_int,
          positional_float,
          optional_str,
          optional_bool,
          optional_int,
          optional_float,
          optional_int_2,
          optional_float_2,
          optional_float_3,
      )
  
imports: from dipy.workflows.workflow import Workflow
  from dipy.workflows.combined_workflow import CombinedWorkflow
label_desc: Use image node_id 1 for calling the DummyFlow obj's underlying member method code with example usage: obj.run(positional_str, positional_bool, positional_int, positional_float, optional_str, optional_bool, optional_int, optional_float, optional_float_2, optional_int_2, optional_float_3, out_dir) and returns: positional_str,  positional_bool,  positional_int,  positional_float,  optional_str,  optional_bool,  optional_int,  optional_float,  optional_int_2,  optional_float_2,  optional_float_3