code: def _chooser_park(chooser, y1, y2, y3, y4):
      """Internal park function."""
      x = [y1, y2, y3, y4]
      if chooser == "foofoo":
          return sub_park_1(x)
      elif chooser == "foobar":
          return sub_park_2(x)
      elif chooser == "barfoo":
          return sub_park_3(x)
      elif chooser == "barbar":
          return sub_park_4(x)
      else:
          raise ValueError("Unknown chooser %s." % (chooser))
  
file_path: dragonfly/examples/synthetic/syn_cnn_2/syn_cnn_2.py
imports: import numpy
  from dragonfly.nn.syn_nn_functions import syn_func1_common
  from synthetic.park2_4.park2_4 import sub_park_1, sub_park_2, sub_park_3, sub_park_4
label_desc: Use image node_id 1 for calling a global function with example usage: _chooser_park(chooser, y1, y2, y3, y4) and returns: sub_park_1, sub_park_2, sub_park_3, sub_park_4