Example perforce pop-up menu

Context.sublime-menu

[
	{
		"caption" : "Perforce",
		"mnemonic" : "P",
		"id": "Perforce",
		"children": [
			{
				"caption" : "Visual Client",
				"mnemonic" : "V",
				"command" : "build",
				"args" : { "variant" : "open_p4v" }
			},
			{
				"caption" : "Checkout",
				"mnemonic" : "C",
				"command" : "build",
				"args" : { "variant" : "checkout_current_file" }
			},
			{
				"caption" : "Diff",
				"mnemonic" : "D",
				"command" : "build",
				"args" : { "variant" : "diff_current_file" }
			}
		]
	}
]