Flow: How to read a value from an instance of Flow component?

exports.install = function() {
    F.route('/', readfromflow);
};

function readfromflow() {

    // FLOW is a global variable defined in FLOW package
    var instance = FLOW.findByReference('mystats')[0];
    if (!instance)
        return this.throw404();

    // instance === Flow "Analytics" Instance
    // Source-Code: https://github.com/totaljs/flowcomponents/blob/master/analytics/analytics.js#L142
    var current = instance.custom.current();

    // Renders serialized data in JSON format
    self.json(current, true);
}

FLOW.findByReference('STRING');
FLOW.findByReference(REGULAR_EXPRESSION);
// Finds all instances by reference
// returns {Array of Components}

FLOW.findByName('STRING');
FLOW.findByName(REGULAR_EXPRESSION);
// Finds all instances by name
// returns {Array of Components}

FLOW.findByComponent('STRING');
FLOW.findByComponent(REGULAR_EXPRESSION);
// Finds all instances by component name
// returns {Array of Components}

FLOW.findById('ID');
// Finds an instance by its ID
// returns {Component}

FLOW.hasComponent(name);
// Is component installed?
// returns {Boolean}

FLOW.hasInstance(id);
// Does an instance of component with the given id exists?
// returns {Boolean}