QGIS/resources/function_help/json/point_on_surface

{
  "name": "point_on_surface",
  "type": "function",
  "groups": ["GeometryGroup"],
  "description": "Returns a point guaranteed to lie on the surface of a geometry.",
  "arguments": [ {"arg":"geometry","description":"a geometry"}],
  "examples": [ { "expression":"point_on_surface($geometry)", "returns":"a point geometry"}]
}