[FEATURE]: gradient edge color

[roonie007]

is it possible to add a gradient colored options line like in the picture below (line 1 -> 2 )

this feature is available in https://github.com/anseki/leader-line, it may helps you

[bcakmakoglu]

No, there is no built-in feature to apply a gradient color to an edge, sorry.

You'd have to implement your own custom edge using maybe the library you linked.
Here's another article demonstrating how to achieve the effect.