KSP, function processor, process function complete

FunctionProcessor.kt

class FunctionProcessor(...) : SymbolProcessor {

    override fun process(resolver: Resolver): List<KSAnnotated> {
        val symbols = resolver
            .getSymbolsWithAnnotation("com.morfly.Function")
            .filterIsInstance<KSClassDeclaration>()

        if (!symbols.iterator().hasNext()) return emptyList()

        val file: OutputStream = codeGenerator.createNewFile(
            dependencies = Dependencies(false),
            packageName = "com.morfly",
            fileName = "GeneratedFunctions"
        )
        file += "package com.morfly\n"

        symbols.forEach { it.accept(Visitor(file), Unit) }

        file.close()
        val unableToProcess = symbols.filterNot { it.validate() }.toList()
        return unableToProcess
    }