code: def testGetByteOffset(self):
      for offset in range(10):
          disp = self.FILE.Get_byte_offset(offset)
          self.assertEqual(disp, offset)
  
imports: from mpi4py import MPI
  import mpiunittest
  import os, tempfile, pathlib
label_desc: Use image node_id 13 for calling the BaseTestFile obj's underlying member method code with example usage: obj.testGetByteOffset() without return types