nextChild

Use an explicit iterator()

Returns the next child held by this structure. Useful for iterating over its children when parsing complex structures.

if no more children are available

Using decodeRethrowing:

val result = structure.decodeRethrowing {
    val child = next()
    // ...
    DecodedStructure(...)
}

Manual iteration:

val iterator = structure.iterator()
while (iterator.hasNext()) {
    val child = iterator.next()
    // Process child
}