docs: def model_results(self, **kwargs) -> str:
          """
          Collates model results from all phases in the directory or some subset if filters are applied.
  
          Parameters
          ----------
          kwargs
              Filters, e.g. pipeline=pipeline1
  
          Returns
          -------
          model_results
              A string joining headers and results for all included phases.
          """
          return "\n\n".join("{}\n\n{}".format(phase.header, phase.model_results) for phase in
                             self.phases_with(**kwargs))