code: public void billingAccount_billingAccountSite_POST(String billingAccount, String billingAccountSite) throws IOException {
  		String qPath = "/telephony/{billingAccount}/billingAccountSite";
  		StringBuilder sb = path(qPath, billingAccount);
  		HashMap<String, Object>o = new HashMap<String, Object>();
  		addBody(o, "billingAccountSite", billingAccountSite);
  		exec(qPath, "POST", sb.toString(), o);
  	}
docs: Used to overwrite current billing account feature by the billing account site
  
  REST: POST /telephony/{billingAccount}/billingAccountSite
  @param billingAccountSite [required] Billing account site (master billing account)
  @param billingAccount [required] The name of your billingAccount