Arrow styling per Edge?

[danjhd]

I'm submitting a...

[ ] Regression (a behavior that used to work and stopped working in a new release)
[ ] Bug report  
[ ] Performance issue
[x] Feature request
[ ] Documentation issue or request
[ ] Other... Please describe:

Current behavior

At present from what i can see of the code it is not possible to apply a style to and Arrow that differs based upon the Edge it is connected to. You have the capability to apply styles "per Edge" so that i can colour the Edge line a different colour based upon some parameters of the Edge but the arrow head of that line will have a different colour and the same colour/style for all Edges.

Expected behavior

I would like to have the ability to use an arrow function in the arrow prop (like you can for the edge prop so that i can use EdgeProperties to style the arrow individually.
OR
Add a new prop to the Edge component to allow me to pass a specific ArrowMarker per Edge.

Minimal reproduction of the problem with instructions

n/a

What is the motivation / use case for changing the behavior?

Having a single style/colour for all arrows when it is possible to style the Edges differently feels like a bad decision, why would customers not want to have individual styles on the Arrow?

Environment

n/a