def test_gray():
        fig = fpl.Figure()
        ig = fig[0, 0].add_image(GRAY_IMAGE)
        assert isinstance(ig, fpl.ImageGraphic)
    
        ig.add_event_handler(
            event_handler,
            "data",
            "cmap",
            "vmin",
            "vmax",
            "interpolation",
            "cmap_interpolation",
        )
    
        # make sure entire data is the same
        npt.assert_almost_equal(ig.data.value, GRAY_IMAGE)
    
        # since this entire image is under the wgpu max texture limit,
        # the entire image should be in the single Texture buffer
        npt.assert_almost_equal(ig.data.buffer[0, 0].data, GRAY_IMAGE)
    
>       ig.cmap = "viridis"

tests/test_image_graphic.py:89: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
fastplotlib/graphics/image.py:205: in cmap
    self._cmap.set_value(self, name)
fastplotlib/graphics/_features/_base.py:346: in set_value_wrapper
    raise exc  # set_value has raised. The line above and the lines 2+ steps below are probably more relevant!
fastplotlib/graphics/_features/_base.py:343: in set_value_wrapper
    set_value(self, graphic_or_key, value)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <fastplotlib.graphics._features._image.ImageCmap object at 0x114c90410>
graphic = ImageGraphic, value = 'viridis'

    @block_reentrance
    def set_value(self, graphic, value: str):
        new_colors = make_colors(256, value)
>       graphic._material.map.texture.data[:] = new_colors
E       AttributeError: 'TextureMap' object has no attribute 'data'