}

    @Test
    fun `can adapt unary function using KotlinClosure1`() {

        fun closure(function: String.() -> String) = KotlinClosure1(function)

        assertEquals(
            "GROOVY",
            closure { uppercase(Locale.US) }.call("groovy")
        )
    }

    @Test
    fun `can adapt unary null receiving function using KotlinClosure1`() {

// tag::kotlinClosure[]
somePlugin {

    // Adapt parameter-less function
    takingParameterLessClosure(KotlinClosure0({
        "result"
    }))

    // Adapt unary function
    takingUnaryClosure(KotlinClosure1<String, String>({
        "result from single parameter $this"
    }))

    // Adapt binary function
    takingBinaryClosure(KotlinClosure2<String, String, String>({ a, b ->
        "result from parameters $a and $b"

 *
 * @param T the expected type of the single argument to the closure.
 * @param action the function to be adapted.
 *
 * @see [KotlinClosure1]
 */
fun <T> Any.closureOf(action: T.() -> Unit): Closure<Any?> =
    KotlinClosure1(action, this, this)


/**
 * Adapts a Kotlin function to a Groovy [Closure] that operates on the
 * configured Closure delegate.
 *

Method <org.gradle.kotlin.dsl.KotlinClosure0.getFunction()> does not have raw return type assignable to org.gradle.api.provider.Provider in (GroovyInteroperability.kt:0)
Method <org.gradle.kotlin.dsl.KotlinClosure1.getFunction()> does not have raw return type assignable to org.gradle.api.provider.Provider in (GroovyInteroperability.kt:0)