Function new_window 

pub async fn new_window(
    session: &Session,
    window: &Window,
    pane: &Pane,
    pane_command: Option<&str>,
) -> Result<(WindowId, PaneId)>

Create a Tmux window in a session exactly named as the passed session.

The new window attributes:

• created in the session
• the window name is taken from the passed window
• the working directory is the pane’s working directory.