code: def testDecreasingX(self):
      # Test that bpf checks whether the x points are ordered
      self.assertConfigureFails(
          BPF(), {"xPoints": [10, 0], "yPoints": [0, 10]}
      )
  
imports: from essentia_test import *
label_desc: Use image node_id 4 for calling the TestBPF obj's underlying member method code with example usage: obj.testDecreasingX() without return types