code: public JSONObject approve(String submissionId, HashMap<String, String> params) throws JSONException {
          return oClient.put("/hr/v3/fp/submissions/" + submissionId + "/approve", params);
      }
docs: Approve an existing Submission
  
  @param	submissionId Submission ID
  @param   params Parameters
  @throws	JSONException If error occurred
  @return	{@link JSONObject}