Appends a row to the given data model. If any value in values is actually null, then
it is considered as a default value. If values is null then all values are set to their default value.
Upon errors -1 will be returned and error will be assigned a
#GError from the #GDA_DATA_MODEL_ERROR domain.
#GList of #GValue* representing the row to add. The
length must match model's column count. These #GValue
are value-copied (the user is still responsible for freeing them).
Appends a row to the given data model. If any value in values is actually null, then it is considered as a default value. If values is null then all values are set to their default value.
Upon errors -1 will be returned and error will be assigned a #GError from the #GDA_DATA_MODEL_ERROR domain.