code: def test_setTzCacheLocation(self):
      self.assertEqual(
          yf.utils._DBManager.get_location(), self.tempCacheDir.name
      )
  
      tkr = "AMZN"
      tz1 = "America/New_York"
      cache = yf.utils.get_tz_cache()
      cache.store(tkr, tz1)
  
      self.assertTrue(
          os.path.exists(
              os.path.join(self.tempCacheDir.name, "tkr-tz.db")
          )
      )
  
file_path: yfinance/tests/utils.py
imports: from .context import yfinance
  import unittest
  import tempfile
  import os
label_desc: Use image node_id 4 for calling the TestCache obj's underlying member method code with example usage: obj.test_setTzCacheLocation() without return types