def METHOD_NAME(self):
    self.nodes = [
        Node(id=1, location=np.array([0, 0.5, 0])),
        Node(id=2, location=np.array([0, 10.5, 0])),
        Node(id=3, location=np.array([0, 20.5, 0])),
        Node(id=4, location=np.array([0, 30.5, 0])),
        Node(id=5, location=np.array([0, 40.5, 0])),
        Node(id=6, location=np.array([0, 50.5, 0])),
    ]
    self.provides(
        self.graph_key,
        GraphSpec(roi=Roi((-100, -100, -100), (200, 200, 200))),
    )
    self.provides(
        self.array_key,
        ArraySpec(
            roi=Roi((-100, -100, -100), (200, 200, 200)),
            voxel_size=Coordinate((4, 1, 1)),
            interpolatable=False,
        ),
    )
    self.provides(
        self.array_key2,
        ArraySpec(
            roi=Roi((-100, -100, -100), (200, 200, 200)),
            voxel_size=Coordinate((1, 2, 1)),
            interpolatable=False,
        ),
    )