//! Provides a `ContainsComponent` trait to indicate that a registry contains a component.
modsealed;usesealed::Sealed;/// Indicates that a component is contained in the registry.
pubtraitContainsComponent<Component, Index>: Sealed<Component, Index> {}impl<Registry, Component, Index>ContainsComponent<Component, Index>forRegistrywhere
Registry:Sealed<Component, Index>{}