Function application_action_target 

pub fn application_action_target(
    room: &str,
    app_id: &str,
    resource: impl Into<String>,
    action: impl Into<String>,
) -> RemoteActionTarget

The target of the action app_id offers on resource in workspace room. The host delivers it to the running app, or launches the app into the workspace first and delivers it once the app offers the action; the app’s own published contract admits it either way.