-struct icu_buf_utf16 * icu_buf_utf16_copy(struct icu_buf_utf16 * dest16,
- struct icu_buf_utf16 * src16);
+struct icu_buf_utf16 *icu_buf_utf16_copy(struct icu_buf_utf16 * dest16,
+ const struct icu_buf_utf16 * src16);
+
+struct icu_buf_utf16 *icu_buf_utf16_append(struct icu_buf_utf16 *dest16,
+ const struct icu_buf_utf16 * src16);
+
+void icu_buf_utf16_log(const char *lead, struct icu_buf_utf16 *src16);