@java.lang.Override
      public com.google.protobuf.ByteString getSharepointFolderIdBytes() {
        java.lang.Object ref = "";
        if (folderSourceCase_ == 6) {
          ref = folderSource_;
        }
        if (ref instanceof String) {
          com.google.protobuf.ByteString b =
              com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
          if (folderSourceCase_ == 6) {
            folderSource_ = b;
          }
          return b;
        } else {
          return (com.google.protobuf.ByteString) ref;
        }
      }
<pre>
The ID of the SharePoint folder to download from.
</pre>

<code>string sharepoint_folder_id = 6;</code>

@return The bytes for sharepointFolderId.
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/SharePointSources.java