How to know wich group am i colliding with when using Raycast 2D?

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0 votes

im using this code:

func process(delta):
var collider = getcollider()

if self.is_colliding():
    get_parent().can_talk = true
    if collider.is_in_group("npc"):
        print ("colliding with npc")

when im about to collide with the object, it gives me this error:

"Attempt to call function 'isingroup' in base 'null instance' on a null instance."

in Engine by (18 points)

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