def append_shaped_absorb(data=bpy.data, use_fake_user=False):
    in_sockets = [
        {'name': 'Color',
         'data_type': 'NodeSocketColor',
         'default_value': (0.0, 0.0, 0.0, 1.0)},
        {'name': 'Density',
         'default_value': 1.0,
         'min_value': 0.0},
        {'name': 'Fac',
         'default_value': 0.5,
         'min_value': 0.0,
         'max_value': 1.0},
        {'name': 'Lower',
         'default_value': 0.0},
        {'name': 'Upper',
         'default_value': 1.0}
    ]

    out_sockets = [
        {'name': 'Volume',
         'data_type': 'NodeSocketShader'},
        {'name': 'Color',
         'data_type': 'NodeSocketColor'},
        {'name': 'Fac',
         'min_value': 0.0,
         'max_value': 1.0}
    ]

    absorb_group = append_group_node(name='Absorb', data=data, use_fake_user=use_fake_user, in_sockets=in_sockets, out_sockets=out_sockets)

    # Create nodes.
    nodes = absorb_group.nodes
    thresh = append_group_inst(nodes=nodes, group_name='Threshold', data=data, group_creation_func=append_threshold, data=data, use_fake_user=use_fake_user)
    holdout = nodes.new('ShaderNodeHoldout')
    mixsh = nodes.new('ShaderNodeMixShader')
    vol_abs = nodes.new('ShaderNodeVolumeAbsorption')
    mxrgb = nodes.new('ShaderNodeMixRGB')

    # Set default values.
    mxrgb.inputs[1].default_value = (0.0, 0.0, 0.0, 0.0)

    # Link nodes.
    links = absorb_group.links
    links.new(mixsh.inputs[0], thresh.outputs[0])  # Link threshold to mix factor.
    links.new(mixsh.inputs[1], holdout.outputs[0])  # Link holdout to mix slot 1.
    links.new(mixsh.inputs[2], vol_abs.outputs[0])  # Link absorb to mix slot 2.
    links.new(mxrgb.inputs[0], thresh.outputs[0])  # Link threshold to color mix.

    # Link to group inputs.
    absorb_input = absorb_group.nodes['Group Input']
    links.new(vol_abs.inputs[0], absorb_input.outputs[0])  # Color.
    links.new(mxrgb.inputs[2], absorb_input.outputs[0])  # Color.
    links.new(vol_abs.inputs[1], absorb_input.outputs[1])  # Density.
    links.new(thresh.inputs[0], absorb_input.outputs[2])  # Fac.
    links.new(thresh.inputs[1], absorb_input.outputs[3])  # Lower.
    links.new(thresh.inputs[2], absorb_input.outputs[4])  # Upper.

    # Link to group outputs.
    absorb_output = absorb_group.nodes['Group Output']
    links.new(absorb_output.inputs[0], mixsh.outputs[0])  # Volume.
    links.new(absorb_output.inputs[1], mxrgb.outputs[0])  # Color.
    links.new(absorb_output.inputs[2], thresh.outputs[0])  # Fac.

    return absorb_group