v.extract
Selects vector objects from a vector layer and creates a new layer containing only the selected objects.
Vector (v.*)
QgsProcessingParameterVectorLayer|input|Vector layer|-1|None|False
QgsProcessingParameterString|where|WHERE conditions of SQL statement without 'where' keyword|
QgsProcessingParameterBoolean|-d|Dissolve common boundaries|True
QgsProcessingParameterVectorDestination|output|Selected