[Neos] limit the NodeType childs inside of yaml config

[Dominic Garms]

Hello again,

One more question is bugging me: how can I limit the NodeType child 
options inside of a custom NodeType ContentCollection? I've seen the 
demo page example of the slider, but I think it is irritating if I can 
add any content into the collection but only images are getting 
rendered. Is this feature planned or can I adjust this through a 
specific yaml option already?

Cheers,
Dominic