Command 'toggle' not found

[mbrowne]

I tried to use this plugin by adding the following to keybindings.json:

{
	"key": "F4",
	"command": "toggle",
	"when": "editorTextFocus",
	"args": {
		"id": "autoReveal", // must be unique
		"overrideWorkspaceSettings": true,
		"values": [ // Note: use the same settings in each values object
			{
			  "explorer.autoReveal": true
			},
			{
			  "explorer.autoReveal": false
			}
		]
	}
}

...but it doesn't work. When I press F4, I get a warning: "command 'toggle' not found".

I'm on Visual Studio Code 1.13.1. There are no error messages in the console (even with settings.cycle.logLevel set to "log").