fn get(v: Vec2d, row: usize) ![]u16
v: Vec2d
row: usize
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fn get(v: Vec2d, row: usize) ![]u16 { const start_row = try math.mul(usize, row, v.cols); const end_row = try math.add(usize, start_row, v.cols); return v.data[start_row..end_row]; }