code: public OvhTrafficExtract billingAccount_line_serviceName_trafficExtracts_POST(String billingAccount, String serviceName, Date dateEnd, Date dateStart) throws IOException {
  		String qPath = "/telephony/{billingAccount}/line/{serviceName}/trafficExtracts";
  		StringBuilder sb = path(qPath, billingAccount, serviceName);
  		HashMap<String, Object>o = new HashMap<String, Object>();
  		addBody(o, "dateEnd", dateEnd);
  		addBody(o, "dateStart", dateStart);
  		String resp = exec(qPath, "POST", sb.toString(), o);
  		return convertTo(resp, OvhTrafficExtract.class);
  	}
docs: Launch a traffic extract on your line
  
  REST: POST /telephony/{billingAccount}/line/{serviceName}/trafficExtracts
  @param dateStart [required] The start date of the traffic extract
  @param dateEnd [required] The end date of the traffic extract
  @param billingAccount [required] The name of your billingAccount
  @param serviceName [required]