Get which program is generated in meteor by babel

Meteor recently implemented option caller available in babel 7. To use it and access information in plugin, one can access Babel.caller poperty like this:

let caller;
module.exports = function(Babel) {
    Babel.caller(function(c) {
            caller = { ...c };
    });
    return {
        visitor: {
            BlockStatement(){
                console.log(caller); // logs e.g. {name: "meteor", arch: "web.browser.legacy"}
            }
        }
    };
};