@java.lang.Override
    public com.google.protobuf.Timestamp getLastModifiedSince() {
      return lastModifiedSince_ == null
          ? com.google.protobuf.Timestamp.getDefaultInstance()
          : lastModifiedSince_;
    }
<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>

@return The lastModifiedSince.
java-storage-transfer/proto-google-cloud-storage-transfer-v1/src/main/java/com/google/storagetransfer/v1/proto/TransferTypes.java