Problem with understanding code

[maddantop]

Godot Version

GODOT 4.2.1

Question

I can`t understand this code, from this post about use of MultiplyerSynchronizer and MultiplayerSpawner(Multiplayer in Godot 4.0: Scene Replication)

@export var player := 1 :
	set(id):
		player = id
		# Give authority over the player input to the appropriate peer.
		$PlayerInput.set_multiplayer_authority(id)

Can somebody please explain, what is happening here?

[drippyparrot]

When the export variable id is set in the editor, the node PlayerInput below the node you just set the variable in gets a function call to set its related peer id to the entered id

In simpler terms:
When you change the id, the PlayerInput changes waht player it talks to