QGIS/resources/function_help/json/get_feature_by_id

{
  "name": "get_feature_by_id",
  "type": "function",
  "groups": ["Record and Attributes"],
  "description": "Returns the feature with an id on a layer.",
  "arguments": [ {"arg":"layer","description":"layer, layer name or layer id"},
                 {"arg":"feature_id","description":"the id of the feature which should be returned"}],
  "examples": [ { "expression":"get_feature_by_id('streets', 1)", "returns":"the feature with the id 1 on the layer \"streets\""}]
}