sp-runtime-interface 17.1.0-dev.2

Substrate runtime interface
Documentation 
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use sp_runtime_interface::runtime_interface;

#[runtime_interface]
trait Test {
	fn foo() {}

	#[cfg(feature = "bar-feature")]
	fn bar() {}

	#[cfg(not(feature = "bar-feature"))]
	fn qux() {}
}

fn main() {
	test::foo();
	test::bar();
	test::qux();
}