pub fn extract_resource<R, F>(
commands: Commands<'_, '_>,
main_resource: Extract<'_, '_, Option<Res<'_, <R as ExtractResource<F>>::Source>>>,
target_resource: Option<ResMut<'_, R>>,
)where
R: ExtractResource<F, Mutability = Mutable>,Expand description
This system extracts the resource of the corresponding Resource type