What is command of expanding suggestions?

[adada5116]

What is the name of command that expands suggestions like when clicking on More:

[jfcherng]

In default keybindings,

	{ "keys": ["f12"], "command": "auto_complete_open_link", "context":
		[
			{ "key": "auto_complete_visible", "operator": "equal", "operand": true },
		]
	},