Unable to specify if include Chinese when creating index

[liketic]

The create index API support specify whether include Chinese or not through the parameter chn in keys and line. However, the class IndexKey and IndexLine didn't expose this field to user.

	public JSONObject ToRequestJson() {
		JSONObject allKeys = new JSONObject();
		JSONArray tokenDict = new JSONArray();
		for (String v:token) {
			tokenDict.add(v);
		}
		
		allKeys.put("type", GetType());
		// only text type require token & caseSensitive
		if (GetType().equals("text")) {
			allKeys.put("token", tokenDict);
			allKeys.put("caseSensitive", GetCaseSensitive());
		}

		allKeys.put("chn", true);

		allKeys.put("doc_value", IsDocValue());
		allKeys.put("alias", getAlias());
		return allKeys;
	}

Here I can add a chn to the request JSON and seems like it works.