code: def test_print():
      tree = rrcf.RCTree()
      tree.insert_point([0.0, 0.0], index=0)
      tree.insert_point([0.0, 0.0], index=1)
      tree.insert_point([0.0, 1.0], index=3)
      print(list(tree.leaves.values())[0])
      print(tree.root)
  
file_path: rrcf/test/test_rrcf.py
imports: import json
  import numpy
  import rrcf
label_desc: Use image node_id 16 for calling a global function with example usage: test_print() without return types