Exclude DOM element from [ngxDragHandle] (reverse directive to [ngxDragHandle])

[viktorleschuk]

[ ] bug report => Search github for a similar issue or PR before submitting
[x] feature request
[ ] support request => Sorry, we will not be able to answer every support request.  Please consider other venues for support requests

Current behavior
Now I have directive to make only one DOM element that accepted to drag parent.
But in my case, the whole parent DOM should be accepted to drag itself, but without one child element. There are solutions for my case now?

Expected behavior
It would be nice to add one boolean parameter to [ngxDragHandle] that should be indicated current DOM element is accepted or non-accepted.
Example:
<div [ngxDragHandle]="false"></div> - then the DOM isn't accepted

Thank you so much. This package is helped me to implement needed functionality in the my application