We should share BoundedClosures

[floitschG]

Currently every implicitly bound closure (by getting a method) has its own class. This is not necessary if the methods have the same name.
We could furthermore store the method name as string in a generic BoundClosureClass.
Example:
class BoundClosure0 {
  var self, methodName; // methodName would not be accessible outside the class.
  BoundClosure0(this.self, this.methodName);

  call$0 = function() { return this.selfthis.methodName; }
}

Each arity (more precisely selector) would need its own BoundClosure class.

[rakudrama]

It would be great for debugging if the name of the closure was such that the name of the method appeared in the JasvaScript stack trace, e.g. Widget.item$bound_closure

I'm skeptical about the call this.selfthis.methodName being fast, but the entire closure class could be generated from relatively little metadata.

[floitschG]

This has been implemented a long time ago.

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Added Fixed label.