replace_source_model
Description:
Replaces source.
data_model with model, which must have the same
characteristics as source.data_model (same column types)
Also for each Holder for which source.
data_model is a source model, this method calls
set_source_model with model to replace the source by the
new model
Parameters:
| this |
a Set object |
| source |
a pointer to a SetSource in this |
| model |