java.lang.AssertionError: Seeking for: 'NewGroovyClass7.groovy'@1b34f4a parent: null indexOf: -1
with parent: '<default package>'@11aae34 parent: org.openide.explorer.view.VisualizerChildren@4cbfff indexOf: 0
Seeking in : org.openide.explorer.view.VisualizerChildren@10bc0fd
  0 = 'NewGroovyClass.groovy'@a2e8e6 parent: org.openide.explorer.view.VisualizerChildren@10bc0fd indexOf: 0
  1 = 'NewGroovyClass3.groovy'@1688494 parent: org.openide.explorer.view.VisualizerChildren@10bc0fd indexOf: 1
  2 = 'NewGroovyClass4.groovy'@d81d94 parent: org.openide.explorer.view.VisualizerChildren@10bc0fd indexOf: 2
  3 = 'NewGroovyClass6.groovy'@7dee57 parent: org.openide.explorer.view.VisualizerChildren@10bc0fd indexOf: 3