Reference to a component for another component

Development Pipeline & Plugins Editor Scripting
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If you add the class specifier EditInlineNew to one component you can create a reference to it from another component in the property window. However, it will create a new component, instead of referencing a pre-existing one.

UCLASS( ClassGroup=(Custom), meta=(BlueprintSpawnableComponent), EditInlineNew)
class UFirstComponent : public UActorComponent
{
}

class USecondComponent : public UActorComponent
{
     UPROPERTY(EditAnywhere)
     UFirstComponent* FirstComponent;
}