code: def split(self):
      self.my_index = None
      self.arr = range(1200)
  
file_path: metaflow/test/core/tests/wide_foreach.py
imports: from metaflow_test import MetaflowTest, ExpectationFailed, steps
label_desc: Use image node_id 1 for calling the WideForeachTest obj's underlying member method code with example usage: obj.split() without return types