code: def test_Overlay_inputs():
      input_map = dict(
          args=dict(
              argstr="%s",
          ),
          auto_thresh_bg=dict(
              argstr="-a",
              mandatory=True,
              position=5,
              xor=("auto_thresh_bg", "full_bg_range", "bg_thresh"),
          ),
          background_image=dict(
              argstr="%s",
              extensions=None,
              mandatory=True,
              position=4,
          ),
          bg_thresh=dict(
              argstr="%.3f %.3f",
              mandatory=True,
              position=5,
              xor=("auto_thresh_bg", "full_bg_range", "bg_thresh"),
          ),
          environ=dict(
              nohash=True,
              usedefault=True,
          ),
          full_bg_range=dict(
              argstr="-A",
              mandatory=True,
              position=5,
              xor=("auto_thresh_bg", "full_bg_range", "bg_thresh"),
          ),
          out_file=dict(
              argstr="%s",
              extensions=None,
              genfile=True,
              hash_files=False,
              position=-1,
          ),
          out_type=dict(
              argstr="%s",
              position=2,
              usedefault=True,
          ),
          output_type=dict(),
          show_negative_stats=dict(
              argstr="%s",
              position=8,
              xor=["stat_image2"],
          ),
          stat_image=dict(
              argstr="%s",
              extensions=None,
              mandatory=True,
              position=6,
          ),
          stat_image2=dict(
              argstr="%s",
              extensions=None,
              position=9,
              xor=["show_negative_stats"],
          ),
          stat_thresh=dict(
              argstr="%.2f %.2f",
              mandatory=True,
              position=7,
          ),
          stat_thresh2=dict(
              argstr="%.2f %.2f",
              position=10,
          ),
          transparency=dict(
              argstr="%s",
              position=1,
              usedefault=True,
          ),
          use_checkerboard=dict(
              argstr="-c",
              position=3,
          ),
      )
      inputs = Overlay.input_spec()
  
      for key, metadata in list(input_map.items()):
          for metakey, value in list(metadata.items()):
              assert getattr(inputs.traits()[key], metakey) == value
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_Overlay_inputs() without return types