Method humanize_column

src/repr/src/explain.rs:556–564

(&self, id: GlobalId, column: usize)

    }

    fn humanize_column(&self, id: GlobalId, column: usize) -> Option<String> {
        match self.items.get(&id) {
            Some(item) => match &item.column_names {
                Some(column_names) => Some(column_names[column].clone()),
                None => None,
            },
            None => self.inner.humanize_column(id, column),
        }
    }

    fn id_exists(&self, id: GlobalId) -> bool {
        self.items.contains_key(&id) || self.inner.id_exists(id)