code: def setUp(self):
      self.start = (51.0, 1.0)
      self.end = (50.0, 2.0)
      self.waypoints = [(52.0, 1.0), (52.0, 0.0)]
      self.data_array = [self.start] + self.waypoints + [self.end]
  
imports: import unittest
  import pytest
  import traitlets
  from ..directions import Directions, DEFAULT_STROKE_COLOR
label_desc: Use image node_id 1 for calling the DirectionsLayer obj's underlying member method code with example usage: obj.setUp() without return types