pub fn add_columns(&mut self, columns: BTreeMap<String, ColumnSchema>) {
        for (name, column) in columns {
            self.columns.insert(name, column);
        }
    }
/// Add the map of columns to the `TableSchema`
Add the map of columns to the `TableSchema`
Add the map of columns to the ` TableSchema `
pub fn add_columns(&mut self, columns: BTreeMap<String, ColumnSchema>) {
        for (name, column) in columns {
            self.columns.insert(name, column);
        }
    }
pub fn add_columns ( & mut self , columns : BTreeMap < String , ColumnSchema > ) { for ( name , column ) in columns { self . columns . insert ( name , column ) ; } }
Add the map of columns to the `TableSchema`
Add the map of columns to the ` TableSchema `
&mut self
columns
BTreeMap<String, ColumnSchema>
&mut self
columns
BTreeMap<String, ColumnSchema>