-- main.mcl --
$prefix = "hello"

func prefixer($x) {
	$prefix + ":" + $x	# i'd only ever expect one ":" in the graph
}

$out1 = prefixer("a")
$out2 = prefixer("b")

test "${out1}" {} # hello:a
test "${out2}" {} # hello:b
-- OUTPUT --
Vertex: test[hello:a]
Vertex: test[hello:b]