package foo class X {} val s = java val ss = System val sss = X val x = "${System}" val xs = java.lang val xss = java.lang.System val xsss = foo.X val xssss = foo val f = { System } fun main(args : Array) { java = null System = null System!! java.lang.System = null java.lang.System!! System is Int System() (System) @foo System null in System }