nit

Author: chelsea-lin

db_dtypes/json.py

@@ -239,6 +239,6 @@ def __array__(self, dtype=None, copy: bool | None = None) -> np.ndarray:
             dtype = empty.dtype
         result = np.empty(len(data), dtype=dtype)
         mask = data.isna()
-        result[mask] = pd.NA
+        result[mask] = self._dtype.na_value
         result[~mask] = data[~mask].pa_data.to_numpy()
         return result