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This idea has not been analyzed for implications to the standard. Take a look at it, and evaluate whether you thing this is a suitable approach.
Please add comments for any issues that is not yet considered in this approach.
The idea is that in a loop approach one component is not allowed to update another one. It can send a requst for data for an exchange item, and if data is available, it can get the data. If data is not available, the source component will record the request. When the source component at some later stage is updated, it will check which requests now have data available and send that.
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