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use swc_common::pass::CompilerPass; pub use swc_common::pass::{Optional, Repeated}; use swc_ecma_visit::Fold; pub fn noop() -> impl Fold { struct Noop; impl Fold for Noop {} Noop } pub trait JsPass: CompilerPass + Fold {} impl<T: ?Sized> JsPass for T where T: CompilerPass + Fold {} pub trait RepeatedJsPass: Repeated + JsPass {} impl<T: ?Sized> RepeatedJsPass for T where T: Repeated + JsPass {}