android {
    sourceSets {
        main.java.srcDirs += "src/main/kotlin"
        test.java.srcDirs += "src/test/kotlin"
        androidTest.java.srcDirs += "src/androidTest/kotlin"
    }

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    kotlinOptions {
        jvmTarget = '1.8'
        freeCompilerArgs += "-Xuse-experimental=kotlin.Experimental"
    }
}