- * Returns: a newly allocated string containing the text at the @offset bounded
- * by the specified @granularity. Use g_free() to free the returned string.
- * Returns %NULL if the offset is invalid or no implementation is available.
+ * Returns: (nullable): a newly allocated string containing the text
+ * at the @offset bounded by the specified @granularity. Use
+ * g_free() to free the returned string. Returns %NULL if the
+ * offset is invalid or no implementation is available.