How to deal with enumerateChildNodesWithName in swift?

Question

Sprites

Hello.
I am writing a game on SpriteKit Swift, in which I created a block sprite, inside this sprite I created several other sprites, which I gave the name "palka".
I need to go through all these "sticks". For this I used:

enumerateChildNodesWithName("palka") { node, _ in 
... }

But he does not iterate over them, as I believe, because they are not at the root of the scene, but inside another sprite.
How can I make enumerateChildNodesWithName enumerate the objects of a particular sprite?
Thanks in advance! =)