Suggest additional attributes key name for basic key-value pairs with placeholders when starting a new key

In arb files, I have very often basic key-value pairs, in that the values contain placeholders, for that each a JSON object with additional attributes with the same key is needed, as specified on https://localizely.com/flutter-arb/. When writing these manually, with the arb-editor extension enabled, it would be helpful, if the arb-editor extension suggested the keys for the JSON objects with the additional attributes of the basic key-value pairs containing placeholders, for that no JSON object with additional attributes have not been defined yet, when starting to write the key for the needed JSON object.

Additionally, it would be helpful if the extension suggested the placeholders occurring in the value of the basic key-value pair corresponding to the key of the additional attributes object of the placeholders section, in which I am starting to type a placeholder name.