Display all data that saves on the Trie

I was looking at the “Super Heroes” demo code from Motoko playground and I can see there’s a function read() that we can use to read a super hero via ID, now I wonder how can I display all the heroes that has been created?

Any one can help please? I’m struggling already 3 days trying to figure it out.

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  import Iter "mo:base/Iter";
  public query func dump() : async [(SuperheroId, Superhero)] {

That works… thank you!! @chenyan, you are a life saver…

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Works Good! Thank You For This…