code: def test_location_kwargs(self):
      marker = Marker(location=(10.0, 5.0))
      assert marker.get_state()["location"] == (10.0, 5.0)
  
imports: import unittest
  import pytest
  import numpy
  import traitlets
  from ..marker import MarkerOptions, Marker, Markers, Symbol, marker_layer, symbol_layer
label_desc: Use image node_id 1 for calling the MarkerTest obj's underlying member method code with example usage: obj.test_location_kwargs() without return types