class_docstr: Test that Element signatures are consistent.
class_docstr_tok: ["Test","that","Element","signatures","are","consistent","."]
code: def test_points_string_signature(self):
      points = Points([], ["a", "b"], "c")
      self.assertEqual(points.kdims, [Dimension("a"), Dimension("b")])
      self.assertEqual(points.vdims, [Dimension("c")])
  
imports: import numpy
  import pandas
  import param
  from holoviews import RGB, Annotation, Area, Bars, BoxWhisker, Contours, Curve, Dataset, Dimension, Div, Element, ErrorBars, Graph, HeatMap, Histogram, Image, Path, Points, Polygons, QuadMesh, Raster, Scatter, Spikes, Tiles, TriMesh, VectorField
  from holoviews.element.comparison import ComparisonTestCase
  from holoviews.element.path import BaseShape
label_desc: Use image node_id 7 for calling the ElementSignatureTest obj's underlying member method code with example usage: obj.test_points_string_signature() without return types