-- main.mcl --
import "second.mcl"

include second.xclass
-- second.mcl --
import "os"
import "fmt"

class xclass {
	#import "os" # this should not be required, top-level should be enough

	$aaa = if os.is_family_debian() { "bbb" }  else { "ccc" }

	print "${aaa}" {
		msg => "hello",
	}
}
-- OUTPUT --
Edge: exprif -> exprIfSubgraphOutput # dummy
Edge: os.is_family_debian -> exprif # condition
Vertex: const: str("hello")
Vertex: exprIfSubgraphOutput
Vertex: exprif
Vertex: os.is_family_debian