public Builder setLastModifiedSince(com.google.protobuf.Timestamp value) {
        if (lastModifiedSinceBuilder_ == null) {
          if (value == null) {
            throw new NullPointerException();
          }
          lastModifiedSince_ = value;
        } else {
          lastModifiedSinceBuilder_.setMessage(value);
        }
        bitField0_ |= 0x00000010;
        onChanged();
        return this;
      }
<pre>
If specified, only objects with a "last modification time" on or after
this timestamp and objects that don't have a "last modification time" are
transferred.

The `last_modified_since` and `last_modified_before` fields can be used
together for chunked data processing. For example, consider a script that
processes each day's worth of data at a time. For that you'd set each
of the fields as follows:

*  `last_modified_since` to the start of the day

*  `last_modified_before` to the end of the day
</pre>

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