QGIS/resources/function_help/json/bounds

{
  "name": "bounds",
  "type": "function",
  "groups": ["GeometryGroup"],
  "description":"Returns a geometry which represents the bounding box of an input geometry. Calculations are in the Spatial Reference System of this geometry.",
  "arguments": [ {"arg":"geometry","description":"a geometry"} ],
  "examples": [ { "expression":"bounds($geometry)", "returns":"bounding box of the current feature's geometry"},
                { "expression":"geom_to_wkt(bounds(geom_from_wkt('Polygon((1 1, 0 0, -1 1, 1 1))')))", "returns":"'Polygon ((-1 0, 1 0, 1 1, -1 1, -1 0))'"}
              ]
}