Polygon Properties
shapes_polygons
ParameterVector|POLYGONS|Polygons|2|False
QgsProcessingParameterBoolean|BPARTS        |Number of Parts|True
QgsProcessingParameterBoolean|BPOINTS       |Number of Vertices|True
QgsProcessingParameterBoolean|BLENGTH       |Perimeter|True
QgsProcessingParameterBoolean|BAREA         |Area|True
OutputVector|OUTPUT|Polygons with Property Attributes