@java.lang.Override
    public int getSerializedSize() {
      int size = memoizedSize;
      if (size != -1) return size;

      size = 0;
      if (((bitField0_ & 0x00000001) != 0)) {
        size += com.google.protobuf.CodedOutputStream.computeMessageSize(1, getScheduleStartDate());
      }
      if (((bitField0_ & 0x00000002) != 0)) {
        size += com.google.protobuf.CodedOutputStream.computeMessageSize(2, getScheduleEndDate());
      }
      if (((bitField0_ & 0x00000004) != 0)) {
        size += com.google.protobuf.CodedOutputStream.computeMessageSize(3, getStartTimeOfDay());
      }
      if (((bitField0_ & 0x00000008) != 0)) {
        size += com.google.protobuf.CodedOutputStream.computeMessageSize(4, getEndTimeOfDay());
      }
      if (((bitField0_ & 0x00000010) != 0)) {
        size += com.google.protobuf.CodedOutputStream.computeMessageSize(5, getRepeatInterval());
      }
      size += getUnknownFields().getSerializedSize();
      memoizedSize = size;
      return size;
    }
<pre>
Interval between the start of each scheduled TransferOperation. If
unspecified, the default value is 24 hours. This value may not be less than
1 hour.
</pre>

<code>.google.protobuf.Duration repeat_interval = 5;</code>
java-storage-transfer/proto-google-cloud-storage-transfer-v1/src/main/java/com/google/storagetransfer/v1/proto/TransferTypes.java