code: def test_layer_predictions_topk(self, output_seq_1):
      actual = output_seq_1.layer_predictions(
          layer=2, printJson=True, topk=15, position=4
      )
      assert len(actual) == 1  # an array for each layer
      assert len(actual[0]) == 15
  
imports: from ecco import output
  import pytest
  import torch
  import numpy
  from ecco.output import NMF
  import ecco
label_desc: Use image node_id 7 for calling the TestOutput obj's underlying member method code with example usage: obj.test_layer_predictions_topk(output_seq_1) without return types