code: def testDelete(self):
      trend2 = trend(2, name="trend2")
      self.dlm1 = self.dlm1 + trend2
      self.dlm1.delete("trend2")
      self.assertEqual(len(self.dlm1.builder.staticComponents), 1)
  
imports: import numpy
  import unittest
  from pydlm.modeler.trends import trend
  from pydlm.modeler.seasonality import seasonality
  from pydlm.modeler.dynamic import dynamic
  from pydlm.modeler.autoReg import autoReg
  from pydlm.dlm import dlm
label_desc: Use image node_id 3 for calling the testDlm obj's underlying member method code with example usage: obj.testDelete() without return types