code: def get_task_runs(self, json_file=None):
          
          if self.project is None:
              raise ProjectError
          loader = create_task_runs_loader(self.project.id, self.tasks,
                                           json_file, self.all)
          self.task_runs, self.task_runs_file = loader.load()
  
          self._check_project_has_taskruns()
          self.task_runs_df = dataframer.create_task_run_data_frames(self.tasks, self.task_runs)
docs: Load all project Task Runs from Tasks.