-- main.mcl --
# this should be a function as a value, iow a lambda
$prefixer = func($x) {
	"hello" + $x	# i'd only ever expect one "hello" string in the graph
}

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

test "${out1}" {} # helloa
test "${out2}" {} # hellob
-- OUTPUT --
Edge: FuncValue -> call # fn
Edge: FuncValue -> call # fn
Vertex: FuncValue
Vertex: call
Vertex: call
Vertex: const: str("a")
Vertex: const: str("b")