@semoro I have following code:
class WhenEntry(val selectors: List<WhenEntrySelector>, val body: Statement) : Statement() {
    override fun generateCode(builder: CodeBuilder) {
        builder.append(selectors, ", ").append(" -> ").append(body)
    }
}

following is the append method:
@JvmName("appendElements")
fun CodeBuilder.append(elements: Collection<Element>, separator: String, prefix: String = "", suffix: String = ""): CodeBuilder {
    return buildList(elements.filter { !it.isEmpty }.map { { append(it) } }, separator, prefix, suffix)
}

any idea how to filter out an element(ElseWhenEntrySelector) from elements in append method

im new to kotlin and slack