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Inputs as signals

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Signals can be used as inputs using the classic Input decorator until they are passed out of the developer preview.  

@Component(...)
class Component {
    @Input({ alias: 'example' }) 
    set value(value: unknown) { 
        this.demo.set(value); 
    }
    demo = signal<unknown | undefined>(undefined);
}

After Once Angular team release inputs as signals we can easily refactor our code to to  

@Component(...)
class Component {
     demo = input<unknown | undefined>(undefined);
}

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