Function polars_lazy::dsl::fold_exprs

pub fn fold_exprs<F: 'static, E: AsRef<[Expr]>>(
    acc: Expr, 
    f: F, 
    exprs: E
) -> Expr where
    F: Fn(Series, Series) -> Result<Series> + Send + Sync + Clone, 

Accumulate over multiple columns horizontally / row wise.