Task with path 'copyMainKotlinClasses' not found in project

build.gradle

// groovy code should have access to kotlin classes for things like blablabla to work
tasks.compileGroovy.dependsOn 'copyMainKotlinClasses'
// and also for tests
tasks.compileTestGroovy.dependsOn 'copyTestKotlinClasses'

internal

DefaultImpls

Button b2 = new Button();
b2.Click  += new RoutedEventHandler(Onb2Click);

val t: List<(Double) -> Double> // not empty

fun transform(d: Double): Double {
    var temp = d
    t.forEach { temp = it(temp) }
    return temp
}

field#getCollectionType()

java.lang.Object

void