Serial2 in Zero used in class object

Official Hardware Classic Zero
1

I found we can use serial2 in pin 10 and 12 from HERE. Thanks to MartinL answer.

But my question is: how can I pass this serial2 in a class object. since my serial data is generated from inside a class object. like this:

// Serial2 pin and pad definitions (in Arduino files Variant.h & Variant.cpp)
#define PIN_SERIAL2_RX       (34ul)               // Pin description number for PIO_SERCOM on D12
#define PIN_SERIAL2_TX       (36ul)               // Pin description number for PIO_SERCOM on D10
#define PAD_SERIAL2_TX       (UART_TX_PAD_2)      // SERCOM pad 2
#define PAD_SERIAL2_RX       (SERCOM_RX_PAD_3)    // SERCOM pad 3

// Instantiate the Serial2 class
Uart Serial2(&sercom1, PIN_SERIAL2_RX, PIN_SERIAL2_TX, PAD_SERIAL2_RX, PAD_SERIAL2_TX);

DataClass data;

void setup()
{
  Serial2.begin(115200);          // Begin Serial2
}

void loop()
{ 

  if(data.avaiable()) {
    data.publish();
  }
}

void SERCOM1_Handler()    // Interrupt handler for SERCOM1
{
  Serial2.IrqHandler();
}


/**====================================================**/

class DataClass:
{
  bool avaiable();

  void publish() {
    serial2.write(data);
  }

private:
  bool avaiable_;
  char data[10];
}
2

make a class member pointer to hold the serial, add begin method that takes pointer and assigns it to member pointer

3

always write Serial2, not serial2

4

Serial ports are best passed around as pointers/references to Stream objects, which means:
Unlike "HardwareSerial" objects, Streams will work with SoftwareSerial or USB-native ports.
Hardware-specific stuff (xxx.begin(), in particular) will need to be done somewhere else, where it knows exactly the type of port being used.

int getc_wait(Stream &S) {
  int c;
  do {
     c = S.read();
  } while (c < 0);
  return c;
}

void setup() {
   Serial.begin(9600);  // initialize HardwareSerial
   Serial.println("type any character to start");
   getc_wait(Serial);
}