# Objective The `BoxedCondition` type alias does not require the underlying system to be read-only. ## Solution Define the type alias using `ReadOnlySystem` instead of `System`. |
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| .. | ||
| entity | ||
| query | ||
| schedule | ||
| storage | ||
| system | ||
| world | ||
| archetype.rs | ||
| bundle.rs | ||
| change_detection.rs | ||
| component.rs | ||
| event.rs | ||
| lib.rs | ||
| reflect.rs | ||
| removal_detection.rs | ||