pub trait PolarsMonthEnd {
// Required method
fn month_end(&self, time_zone: Option<&Tz>) -> Result<Self, PolarsError>
where Self: Sized;
}
pub trait PolarsMonthEnd {
// Required method
fn month_end(&self, time_zone: Option<&Tz>) -> Result<Self, PolarsError>
where Self: Sized;
}