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Y.mix has a few mode to control the behavior of copying. i.e.

• default(0): object to object
• 1: prototype to prototype (old augment)
• 2: prototype to prototype and object props (new augment)
• 3: prototype to object
• 4: object to prototype

given the following case:
var Foo = function() {}
Foo.prototype.name = 'foo'

var Bar = function() {}
Bar.prototype.name = 'bar'
Bar.prototype.sayMyName = function() { return this.name}

var newFoo = Y.mix(new Foo(), new Bar())

is there a mode that is suppose to copy the sayMyName function to newFoo? in my test, none of the modes work.