function sizeChanged (node, components, size) {
    var finalSize = size.get();
    var x = finalSize[0];
    var y = finalSize[1];
    var z = finalSize[2];
    if (node.onSizeChange) node.onSizeChange(x, y, z);
    for (var i = 0, len = components.length ; i < len ; i++)
        if (components[i] && components[i].onSizeChange)
            components[i].onSizeChange(x, y, z);
    size.sizeChanged = false;
}
Private method to alert the node and components that the size changed.

@method
@private

@param {Node} node Node to potentially call onSizeChange on
@param {Array} components a list of the nodes' components
@param {Size} size the size class for the Node

@return {undefined} undefined