Why in the World would they need to ?
Just use the pin designations silkscreened on the board.
Want to use the pin marked A3 as an input ?
pinMode(A3, INPUT_PULLUP);
Want to iterate through the pins marked A0 to A5 ?
for (int p = A0; p <= A5; p++)
{
digitalWrite(p, HIGH);
delay(1000);
digitalWrite(p, LOW);
}
and so on