STEP 0:
    modifications:
        U : classA.0.kt -> classA.kt
        U : interface.0.kt -> interface.kt
    added file: classA.kt, interface.kt
STEP 1:
    modifications:
        U : classA.1.kt -> classA.kt
    modified ir: classA.kt
STEP 2:
    modifications:
        U : interface.2.kt -> interface.kt
    modified ir: interface.kt
    updated exports: interface.kt
    updated imports: classA.kt
STEP 3:
STEP 4:
    modifications:
        U : interface.4.kt -> interface.kt
    modified ir: interface.kt
    updated exports: interface.kt
    updated imports: classA.kt
STEP 5:
    updated exports: interface.kt
