What is this node on the picture?

Hello, I can`t find what this node is. If it is a custom node, how can I alternatively get a key from Array of Input Action Key Mapping Structure(I want to display some key name on screen on BeginPlay)

Hi man , in unreal you can “Break” or "split "some complex variables and structures.
these two are the same node, the get array, but one is closed, and one is splitted,

Oh, thank you. You realy helped me a lot.