using "ng-fx-col" results in:

<div fxLayout="column" fxLayoutAlign="${start|center|end|space-around|space-between} ${start|center|end|stretch}" fxLayoutGap="gappx">
  
</div>

But I more often find myself needing just the attributes.
I would suggest that ng-fx should only apply the attributes as it can be used on other elements as well.. not only divs