private
    fun List<MappedApiFunctionParameter>.toDeclarationString(): String =
        takeIf { it.isNotEmpty() }?.let { list ->
            list.mapIndexed { index, p ->
                when {
                    index == list.lastIndex && p.isVarargs && p.type.isKotlinArray -> "vararg `${p.name}`: ${singleTypeArgumentStringOf(p)}"