QGIS/resources/function_help/json/reverse

{
  "name": "reverse",
  "type": "function",
  "groups": ["GeometryGroup"],
  "description": "Reverses the direction of a line string by reversing the order of its vertices.",
  "arguments": [{
    "arg": "geometry",
    "description": "a geometry"
  }],
  "examples": [{
    "expression": "geom_to_wkt(reverse(geom_from_wkt('LINESTRING(0 0, 1 1, 2 2)')))",
    "returns": "'LINESTRING(2 2, 1 1, 0 0)'"
  }],
  "tags": ["direction", "order", "vertices", "reverses", "line", "reversing"]
}