code: def test_compose_cmap(eg_cmaps):
      value = np.array([1.0, 2.0, 3.0])
      b = compose(eg_cmaps.e, eg_cmaps.e)
      assert np.allclose(b(value), value)
  
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 11 for calling a global function with example usage: test_compose_cmap(eg_cmaps) without return types