code: def setUp(self):
      self.xs = range(11)
      self.y_ints = [i * 2 for i in range(11)]
      self.ys = np.linspace(0, 1, 11)
      self.columns = Dataset(
          np.column_stack([self.xs, self.y_ints]),
          kdims=["x"],
          vdims=["y"],
      )
  
imports: import numpy
  from holoviews import Dataset, HoloMap
  from holoviews.core import Dimension
  from holoviews.core.ndmapping import MultiDimensionalMapping, NdMapping, UniformNdMapping
  from holoviews.core.overlay import Overlay
  from holoviews.element import Curve
  from holoviews.element.comparison import ComparisonTestCase
label_desc: Use image node_id 1 for calling the HoloMapTest obj's underlying member method code with example usage: obj.setUp() without return types