code: def setUp(self):
      self.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 SymbolTest obj's underlying member method code with example usage: obj.setUp() without return types