pub trait ToDummies {
    // Required method
    fn to_dummies(
        &self,
        separator: Option<&str>,
        drop_first: bool
    ) -> Result<DataFrame, PolarsError>;
}Available on crate feature 
polars-ops only.pub trait ToDummies {
    // Required method
    fn to_dummies(
        &self,
        separator: Option<&str>,
        drop_first: bool
    ) -> Result<DataFrame, PolarsError>;
}polars-ops only.