Function polars::prelude::arity::try_unary_elementwise   
source ยท pub fn try_unary_elementwise<'a, T, V, F, K, E>(
    ca: &'a ChunkedArray<T>,
    op: F
) -> Result<ChunkedArray<V>, E>where
    T: PolarsDataType,
    V: PolarsDataType,
    F: FnMut(Option<<T as PolarsDataType>::Physical<'a>>) -> Result<Option<K>, E>,
    <V as PolarsDataType>::Array: ArrayFromIter<Option<K>>,