code: def __str__(self):
      return "test '%s' graph '%s'" % (
          self.test.__class__.__name__,
          self.graphspec["name"],
      )
  
file_path: metaflow/test/core/metaflow_test/formatter.py
imports: import sys
  import inspect
label_desc: Use image node_id 9 for calling the FlowFormatter obj's underlying member method code with example usage: obj.__str__() and returns: unknown