Polygon Dissolve
shapes_polygons
ParameterVector|POLYGONS|Polygons|2|False
ParameterTableField|FIELD_1|1. Attribute|POLYGONS|-1|True
ParameterTableField|FIELD_2|2. Attribute|POLYGONS|-1|True
ParameterTableField|FIELD_3|3. Attribute|POLYGONS|-1|True
ParameterSelection|DISSOLVE|Dissolve...|[0] polygons with same attribute value;[1] all polygons;[2] polygons with same attribute value (keep inner boundaries);[3] all polygons (keep inner boundaries)
OutputVector|DISSOLVED|Dissolved Polygons