def get_run_details_json(self):
run_details_filename = "<STR_LIT>"<EOL>run_details_json_id = dxpy.find_one_data_object(more_ok=False,zero_ok=True,project=self.dx_project_id,name=run_details_filename)["<STR_LIT:id>"]<EOL>json_data = json.loads(dxpy.open_dxfile(dxid=run_details_json_id).read())<EOL>return json_data<EOL>
Retrieves the JSON object for the stats in the file named run_details.json in the project 
specified by self.dx_project_id.

Returns: 
    JSON object of the run details.