Is it possible for support on multivariate analysis (MBSTS)?

Hi Team, thank you for the great package!
I'm trying to use this package to analysis impact on multiple time series, but I noticed that current package only supports doing these independently. Is it possible to provide support for analysis with multiple variables, using methods like mbsts? Or could you shed some light on how can I do this with the mbsts() function in the bsts package? Thank you!