pub fn has_column_name(&self, column: &str) -> bool {
        for c in &self.columns {
            if c.name == column {
                return true;
            }
        }
        false
    }
/// determine if this table has a colum named
determine if this table has a colum named
determine if this table has a colum named
pub fn has_column_name(&self, column: &str) -> bool {
        for c in &self.columns {
            if c.name == column {
                return true;
            }
        }
        false
    }
pub fn has_column_name ( & self , column : & str ) -> bool { for c in & self . columns { if c . name == column { return true ; } } false }
determine if this table has a colum named
determine if this table has a colum named
&self
column
&str
&self
column
&str