code: public void setOccurrenceDays(java.util.Collection<Integer> occurrenceDays) {
          if (occurrenceDays == null) {
              this.occurrenceDays = null;
              return;
          }
  
          this.occurrenceDays = new com.amazonaws.internal.SdkInternalList<Integer>(occurrenceDays);
      }
docs: <p>
  The days. For a monthly schedule, this is one or more days of the month (1-31). For a weekly schedule, this is
  one or more days of the week (1-7, where 1 is Sunday). You can't specify this value with a daily schedule. If the
  occurrence is relative to the end of the month, you can specify only a single day.
  </p>
  
  @param occurrenceDays
  The days. For a monthly schedule, this is one or more days of the month (1-31). For a weekly schedule,
  this is one or more days of the week (1-7, where 1 is Sunday). You can't specify this value with a daily
  schedule. If the occurrence is relative to the end of the month, you can specify only a single day.