Hey Folks, Does anyone know how to suppress/opt in...

# multiplatform

[Harish G]

Hey Folks,
Does anyone know how to suppress/opt in to InternalSerializationApi at the project level in a Kotlin Multiplatform project?

`This declaration is opt-in and its usage should be marked with @kotlinx.serialization.InternalSerializationApi or `@OptIn(markerClass = kotlinx.serialization.InternalSerializationApi.class)``

Currently, adding this at the file level works:
@file:OptIn(InternalSerializationApi::class)
But I don’t want to add it to every file.
Is there a way to apply this globally across all KMP source sets/project files? i tried it in project level but it not work for me.

kotlin {
 sourceSets.all {
        languageSettings.optIn("kotlin.experimental.ExperimentalObjCName")
        languageSettings.optIn("kotlin.time.ExperimentalTime")
        languageSettings.optIn("kotlinx.serialization.InternalSerializationApi")
        languageSettings.optIn("kotlinx.serialization.ExperimentalSerializationApi")
    }
 compilerOptions {
        freeCompilerArgs.add("-Xexpect-actual-classes")
        optIn.add("kotlinx.serialization.InternalSerializationApi")
        optIn.add("kotlinx.serialization.ExperimentalSerializationApi")
   }
}

tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompilationTask<*>>().configureEach {
    compilerOptions {
        freeCompilerArgs.add("-opt-in=kotlinx.serialization.InternalSerializationApi")
        freeCompilerArgs.add("-opt-in=kotlinx.serialization.ExperimentalSerializationApi")
    }
}

[tapchicoma]

kotlin.compilerOptions.optIn.add("") should work - what problem do you see?

[Harish G]

@tapchicoma i got this kind of warning message in my api model class .

[tapchicoma]

please ensure that your are adding it in the correct place and that other build logic not overrides it. Otherwise please file a new Kotlin issue