pub trait Pow {
    fn pow_f32(&self, _exp: f32) -> ChunkedArray<Float32Type> { ... }
    fn pow_f64(&self, _exp: f64) -> ChunkedArray<Float64Type> { ... }
}This is supported on crate feature 
object only.pub trait Pow {
    fn pow_f32(&self, _exp: f32) -> ChunkedArray<Float32Type> { ... }
    fn pow_f64(&self, _exp: f64) -> ChunkedArray<Float64Type> { ... }
}object only.