PyQGIS - Densify geometries given an interval

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I have question, is it possible to make python command for QGIS function "Densify geometries given an interval":

• input layer: Polygon.shp
• output layer: Densify_interval.shp
• interval: 50 meters

for. example...

processing.runalg("qgis:"DENSIFY_GIVEN_AN_INTERVAL ???",input, output", interval)

أكثر...