tasks.register("foobar", FooBar) { task ->
  // Code completion does NOT work on these cases because
  // it's not aware of delegate
  foo = "bar"
  foo.set("bar")
  // Code completion does NOT work here because it's not
  // aware of Gradle decorator for abstract task property
  task.foo = "bar" 
  // Code completion work here, but syntax is not simple
  task.foo.set("bar")
}