apiSourceFileFor(member).let { apiSourceFile ->
            when (apiSourceFile) {
                is ApiSourceFile.Java -> sources.executeQuery(apiSourceFile, JavaSourceQueries.getSince(member))
                is ApiSourceFile.Kotlin -> sources.executeQuery(apiSourceFile, KotlinSourceQueries.getSince(member))
            }
        }

    private
    fun apiSourceFileFor(member: JApiCompatibility): ApiSourceFile =

    fun <T : Any?> executeQuery(apiSourceFile: ApiSourceFile.Java, query: JavaSourceQuery<T>): T =
        openJavaCompilationUnitsByFile
            .computeIfAbsent(apiSourceFile.currentFile) { JavaParser().parse(it).getResult().get() }
            .accept(query.visitor, null)
            ?: query.defaultValue


    fun <T : Any?> executeQuery(apiSourceFile: ApiSourceFile.Kotlin, transform: (KtFile) -> T): T =