Merge "Simplify handling of nested classes" into main

fun getClassFlag(classItem: ClassItem): String? {

    var classFlag = getFlagAnnotation(classItem)

    var cur = classItem

    // If a class is not an inner class, use its @FlaggedApi annotation value.

    // If a class is not a nested class, use its @FlaggedApi annotation value.

    // Otherwise, use the flag value of the closest outer class that is annotated by @FlaggedApi.

    while (cur.isInnerClass() && classFlag == null) {

        cur = cur.parent() as ClassItem

    while (classFlag == null) {

        cur = cur.containingClass() ?: break

        classFlag = getFlagAnnotation(cur)

    }

    return classFlag