code: def _sorted_feats(arrays):
      flat = np.concatenate([_rank2(arr) for arr in arrays])
      return np.sort(flat, axis=0)
  
file_path: stellargraph/tests/mapper/test_corrupted.py
imports: import pytest
  import numpy
  from stellargraph.mapper import *
  from ..test_utils.graphs import example_graph_random
label_desc: Use image node_id 6 for calling a global function with example usage: _sorted_feats(arrays) and returns: np