public com.google.storagetransfer.v1.proto.TransferTypes.TransferManifest
          getTransferManifest() {
        if (transferManifestBuilder_ == null) {
          return transferManifest_ == null
              ? com.google.storagetransfer.v1.proto.TransferTypes.TransferManifest
                  .getDefaultInstance()
              : transferManifest_;
        } else {
          return transferManifestBuilder_.getMessage();
        }
      }
<pre>
A manifest file provides a list of objects to be transferred from the data
source. This field points to the location of the manifest file.
Otherwise, the entire source bucket is used. ObjectConditions still apply.
</pre>

<code>.google.storagetransfer.v1.TransferManifest transfer_manifest = 15;</code>

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