code: def voxel_to_world():
      # utility function for generating trivial CoordinateMap
      incs = CoordinateSystem("ijk", "voxels")
      outcs = CoordinateSystem("xyz", "world")
      map = lambda x: x + 1
      inv = lambda x: x - 1
      return incs, outcs, map, inv
  
imports: from copy import copy
  from types import SimpleNamespace
  import numpy
  from ..coordinate_map import AffineTransform, AxisError, CoordinateMap, CoordMapMaker, CoordMapMakerError, _as_coordinate_map, _fix0, append_io_dim, axmap, compose, drop_io_dim, equivalent, input_axis_index, io_axis_indices, orth_axes, product, shifted_domain_origin, shifted_range_origin
  from ..coordinate_system import CoordinateSystem, CoordinateSystemError, CoordSysMaker
  import pytest
  from numpy.testing import assert_almost_equal, assert_array_equal
label_desc: Use image node_id 13 for calling a global function with example usage: voxel_to_world() and returns: incs,  outcs,  map,  inv