code: public OvhOvhPabxDialplanExtension billingAccount_ovhPabx_serviceName_dialplan_dialplanId_extension_extensionId_GET(String billingAccount, String serviceName, Long dialplanId, Long extensionId) throws IOException {
  		String qPath = "/telephony/{billingAccount}/ovhPabx/{serviceName}/dialplan/{dialplanId}/extension/{extensionId}";
  		StringBuilder sb = path(qPath, billingAccount, serviceName, dialplanId, extensionId);
  		String resp = exec(qPath, "GET", sb.toString(), null);
  		return convertTo(resp, OvhOvhPabxDialplanExtension.class);
  	}
docs: Get this object properties
  
  REST: GET /telephony/{billingAccount}/ovhPabx/{serviceName}/dialplan/{dialplanId}/extension/{extensionId}
  @param billingAccount [required] The name of your billingAccount
  @param serviceName [required]
  @param dialplanId [required]
  @param extensionId [required]