code: def test_bounds_no_markers(self):
      layer = Markers(markers=[])
      assert not layer.has_bounds
  
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 3 for calling the MarkersTest obj's underlying member method code with example usage: obj.test_bounds_no_markers() without return types