``` sourceSets.getByName("main").apply { ...

# gradle

[orangy]

sourceSets.getByName("main").apply {
        val hasConvention = this as HasConvention
        val plugin = hasConvention.convention.getPlugin<KotlinSourceSet>()
        plugin.kotlin.srcDir("src")

        resources.srcDir("resources")
        allSource.srcDir("src")
    }