gradle kotlin DSL extendsfrom

Question

How can I reformulate:

testCompile.extendsFrom compileOnly

of the Gradle Groovy DSL to its Kotlin-based equivalent?

configurations {
        testCompile{
            extendsFrom(compileOnly)
        }
    }

My approach above fails.

Answer 1

configurations {
        create("testCompile").apply {
            extendsFrom(configurations.compileOnly.get())
        }
    }

Answer 2

If you want to change an already existing config use

configurations.testImplementation.get().extendsFrom(configurations.compileOnly.get())