{
  "name": "is_layer_visible",
  "type": "function",
  "description": "Returns true if a specified layer is visible.",
  "arguments": [
	{"arg":"layer", "description":"a string, representing either a layer name or layer ID"}
  ],
  "examples": [
	{ "expression":"is_layer_visible('baseraster')", "returns":"True"}
  ]
}