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-rw-r--r--ecs/src/system.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/ecs/src/system.rs b/ecs/src/system.rs
index 8f4d0b0..22e2215 100644
--- a/ecs/src/system.rs
+++ b/ecs/src/system.rs
@@ -13,6 +13,7 @@ pub trait System<Impl>: 'static
type Input;
+ #[must_use]
fn initialize(self, input: Self::Input) -> Self;
fn run(&mut self, component_storage: &mut ComponentStorage);