@alg(name="tambah_luas_ha", label="Tambah kolom luas (hektare)", group="kehutanan", group_label="Kehutanan")
@alg.input(type=alg.SOURCE, name="INPUT", label="Layer poligon", types=[2])
@alg.input(type=alg.SINK, name="OUTPUT", label="Hasil")
def tambah_luas_ha(instance, parameters, context, feedback, inputs):