Create an instance of an Generic Class from a String in Dart?

[DartBot]

This issue was originally filed by @luisvt

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It should be a way to create generic classes from strings, for example:

    var class_name = "GenericController<Book>"; // user input here
    var bookController = genericControllerCm.newInstance(const Symbol(""), [], type: Book);

[DartBot]

This comment was originally written by @zoechi

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seems to be a dupe of dartbug.com/12921

[DartBot]

This comment was originally written by @luisvt

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Yes, it is. Sorry for that

[DartBot]

This comment was originally written by @zoechi

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No problem, happens all the time. I just try to provide some added value by adding links ;-)

[floitschG]

Added Duplicate label.
Marked as being merged into #12921.