{
  "name": "num_selected",
  "type": "function",
  "groups": ["Record and Attributes"],
  "description": "Returns the number of selected features on a given layer. By default works on the layer on which the expression is evaluated.",
  "arguments": [
        {
          "arg": "layer",
          "optional": true,
          "default": "current layer",
          "description": "The layer (or its id or name) on which the selection will be checked."
        }
  ],
  "examples": [
	{ "expression":"num_selected()", "returns":"The number of selected features on the current layer."},
	{ "expression":"num_selected('streets')", "returns":"The number of selected features on the layer streets"}
  ]
}