fix lint errors
fix lint errors

alexgorban/models,tombstone/models,tombstone/models,alexgorban/models,tombstone/models,tombstone/models,alexgorban/models,derekjchow/models,derekjchow/models,tombstone/models,tombstone/models,alexgorban/models,derekjchow/models,alexgorban/models,derekjchow/models,derekjchow/models