Vectorising Grid Classes
shapes_grid
QgsProcessingParameterRasterLayer|GRID|Grid|None|False
QgsProcessingParameterEnum|CLASS_ALL|Class Selection|[0] one single class specified by class identifier;[1] all classes|False|1
QgsProcessingParameterNumber|CLASS_ID|Class Identifier|QgsProcessingParameterNumber.Integer|0|False|None|None
QgsProcessingParameterEnum|SPLIT|Vectorised class as...|[0] one single (multi-)polygon object;[1] each island as separated polygon|False|1
QgsProcessingParameterVectorDestination|POLYGONS|Vectorized