a #GdaHolder. It can't be NULL
a #gint with the number of column in source_model
a #GdaDataModel. It could be NULL
Frees any resources taken by node
struct. If node
is %NULL, then nothing happens.
Set column number in the #GdaDataModel used node
. If no #GdaDataModel is set
then column is set to invalid (-1);
Since 5.2, you must consider this struct as opaque. Any access to its internal must use public API. Don't try to use #gda_set_node_free on a struct that was created manually.