code: def test_point_radius(self):
      heatmap = heatmap_layer(self.locations, point_radius=2)
      state = heatmap.get_state()
      assert state["point_radius"] == 2
  
imports: import unittest
  import pytest
  import traitlets
  from ..heatmap import _HeatmapOptionsMixin, heatmap_layer, Heatmap, WeightedHeatmap
  from ..geotraitlets import InvalidPointException, InvalidWeightException
label_desc: Use image node_id 9 for calling the HeatmapLayer obj's underlying member method code with example usage: obj.test_point_radius() without return types