pub fn shown_names(raw: &[PlSmallStr], header: Option<&[String]>) -> Vec<String>Expand description
The names a read shows for the columns Polars named raw: the header lines’
names by position when --header-rows gave them, else Polars’ own, trimmed. A
blank name is column_N, as Polars names a headerless file’s; a name already
taken gets _duplicated_K, as Polars marks a repeated header.