code: def test_k_nearest_neighbors():
      assert k_nearest_neighbors(POINTS, [99, 99], 1) == [[100, 100]]
  
file_path: deck.gl/bindings/pydeck/tests/test_data_utils.py
imports: import json
  import pandas
  from pydeck.data_utils.viewport_helpers import compute_view, bbox_to_zoom_level, euclidean, is_pandas_df, geometric_mean, get_bbox, get_n_pct, k_nearest_neighbors
  from pydeck import ViewState
label_desc: Use image node_id 4 for calling a global function with example usage: test_k_nearest_neighbors() without return types