color: red !important
@extend foo !optional

----------------------------------------------------

[
	["property-declaration", [
		["property", ["color"]],
		["punctuation", ":"],
		" red ",
		["important", "!important"]
	]],
	["atrule-declaration", [
		["atrule", "@extend"],
		" foo ",
		["important", "!optional"]
	]]
]

----------------------------------------------------

Checks for !important and !optional.