@@can.getValue()

The @@can.getValue symbol points to a function that returns the context object's value. Value may mean different things in different contexts; e.g. a can-compute's value is the value stored internally to the compute, while an observable object's value may be a non-observable, serialized representation of its properties.

var internalValue = undefined
export var foo = function(val) {
    if(val) {
        internalValue = val;
    } else {
        return internalValue;
    }
};

// Get the internal value as the representative value
foo[canSymbol.for('can.getValue')] = function() { 
    return internalValue;
}