public abstract unowned Value? get_value_at (int col, int row) throws Error
Retrieves the data stored in the given position (identified by the
row parameters) on a data model.
Note1: the returned Value must not be modified directly (unexpected behaviours may occur if you do so).
Note2: the returned value may become invalid as soon as any Libgda part is executed again, which means if you want to keep the value, a copy must be made, however it will remain valid as long as the only Libgda usage is calling get_value_at for different values of the same row.
a DataModel object.
a valid column number.
a valid row number.
a Value containing the value stored in the given position, or