data NestedType:
    val: string

data NestedStruct:
    one: NestedType

service Test("service"):
    test1() -> NestedStruct
    test2(arg1: NestedType, arg2: string) -> NestedStruct

func test3() -> NestedType:
    res <- Test.test1()
    <- res.one

func test() -> NestedStruct:
    struct <- test3()
    res <- Test.test2(struct, struct.val)
    <- res