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pub trait WindowFunction: Send { fn apply(&self, data: &mut [f32]); fn reverse(&self, data: &mut [f32]); } pub struct RectangularWindow {} impl RectangularWindow { pub fn new(_fft_size: usize) -> Self { Self {} } } impl WindowFunction for RectangularWindow { fn apply(&self, _data: &mut [f32]) {} fn reverse(&self, _data: &mut [f32]) {} }