Modifies a value in model, at (col, row).
Upon errors FALSE will be returned and error will be assigned a #GError from the #GDA_DATA_MODEL_ERROR domain.
column number.
row number.
a #GValue (not null)
TRUE if the value in the data model has been updated and no error occurred
DataModelException
Modifies a value in model, at (col, row).
Upon errors FALSE will be returned and error will be assigned a #GError from the #GDA_DATA_MODEL_ERROR domain.