class_docstr: one of the values in a list was not empty when it should have been
code: def offender(self):
      index = [x is not None for x in self.cause["got"]].index(True)
      return index, self._master_name(index)
  
imports: import textwrap
label_desc: Use image node_id 1 for calling the NotANone obj's underlying member method code with example usage: obj.offender() and returns: index,  self