Support for arrow functions everywhere

[tenoriojuann]

There are methods (i.e each()) whose output are compatible with arrow functions since when running each() against a NodeMap will produce 2 arguments, nodeId and node.
Other methods (i.e readNode(), connect()) however do not work with the arrow functions since this becomes the wanted value.

Is there a plan to support node-style-callbacks? Meaning error first and then the successful response data?