code: public void setExpiryDate(
              @IntRange(from = 1, to = 12) int month,
              @IntRange(from = 0, to = 9999) int year) {
          mExpiryDateEditText.setText(DateUtils.createDateStringFromIntegerInput(month, year));
      }
docs: Set the expiration date. Method invokes completion listener and changes focus
  to the CVC field if a valid date is entered.
  
  Note that while a four-digit and two-digit year will both work, information
  beyond the tens digit of a year will be truncated. Logic elsewhere in the SDK
  makes assumptions about what century is implied by various two-digit years, and
  will override any information provided here.
  
  @param month a month of the year, represented as a number between 1 and 12
  @param year a year number, either in two-digit form or four-digit form