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  @Component(parameters={"Autocomplete.id=auto", . . . }) @Mixins("Autocomplete", "DefaultFromCookie"})
  private TextField userId;

If the component and a mixin both supports informal parameters, the mixin will receive the all the unqualified informal parameters. If more than one Mixin supports informal parameters the results are undefined.

Note that when you define an implementation mixin, and the mixin has parameters, there's no way to bind those parameters as part of the implementation. They simply become available when the composite component (including the mixin) is introduced into a page.

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