java.lang.NullPointerException
   at com.sun.tools.javac.api.JavacTrees.getTypeMirror(JavacTrees.java:183)
   at org.netbeans.modules.web.wicket.tree.ComponentIdFinder.scanInArgs(ComponentIdFinder.java:44)
   at org.netbeans.modules.web.wicket.tree.ComponentIdFinder.visitMethodInvocation(ComponentIdFinder.java:89)
   at org.netbeans.modules.web.wicket.tree.ComponentIdFinder.visitMethodInvocation(ComponentIdFinder.java:34)
   at com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1316)
   at com.sun.source.util.TreeScanner.scan(TreeScanner.java:76)
   at com.sun.source.util.TreeScanner.visitExpressionStatement(TreeScanner.java:240)
   at com.sun.tools.javac.tree.JCTree$JCExpressionStatement.accept(JCTree.java:1156)
   at com.sun.source.util.TreeScanner.scan(TreeScanner.java:76)
   at com.sun.source.util.TreeScanner.scan(TreeScanner.java:90)
   at com.sun.source.util.TreeScanner.visitBlock(TreeScanner.java:160)
   at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:782)
   at com.sun.source.util.TreeScanner.scan(TreeScanner.java:76)
   at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:80)
   at com.sun.source.util.TreeScanner.visitMethod(TreeScanner.java:143)
   at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:682)
   at org.netbeans.modules.web.wicket.tree.ComponentIdFinder.visitNewClass(ComponentIdFinder.java:71)
   at org.netbeans.modules.web.wicket.tree.ComponentIdFinder.visitNewClass(ComponentIdFinder.java:34)
   at com.sun.tools.javac.tree.JCTree$JCNewClass.accept(JCTree.java:1371)
   at com.sun.source.util.TreeScanner.scan(TreeScanner.java:76)
   at com.sun.source.util.TreeScanner.scan(TreeScanner.java:90)
   at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:98)
   at com.sun.source.util.TreeScanner.visitMethodInvocation(TreeScanner.java:268)
   at org.netbeans.modules.web.wicket.tree.ComponentIdFinder.visitMethodInvocation(ComponentIdFinder.java:92)
   at org.netbeans.modules.web.wicket.tree.ComponentIdFinder.visitMethodInvocation(ComponentIdFinder.java:34)
   at com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1316)
   at com.sun.source.util.TreeScanner.scan(TreeScanner.java:76)
   at com.sun.source.util.TreeScanner.visitExpressionStatement(TreeScanner.java:240)
   at com.sun.tools.javac.tree.JCTree$JCExpressionStatement.accept(JCTree.java:1156)
   at com.sun.source.util.TreeScanner.scan(TreeScanner.java:76)
   at com.sun.source.util.TreeScanner.scan(TreeScanner.java:90)
   at com.sun.source.util.TreeScanner.visitBlock(TreeScanner.java:160)
   at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:782)
   at com.sun.source.util.TreeScanner.scan(TreeScanner.java:76)
   at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:80)
   at com.sun.source.util.TreeScanner.visitMethod(TreeScanner.java:143)
   at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:682)
   at com.sun.source.util.TreeScanner.scan(TreeScanner.java:76)
   at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:80)
   at com.sun.source.util.TreeScanner.scan(TreeScanner.java:90)
   at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:98)
   at com.sun.source.util.TreeScanner.visitClass(TreeScanner.java:132)
   at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:605)
   at com.sun.source.util.TreeScanner.scan(TreeScanner.java:76)
   at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:80)
   at com.sun.source.util.TreeScanner.visitNewClass(TreeScanner.java:277)
   at org.netbeans.modules.web.wicket.tree.ComponentIdFinder.visitNewClass(ComponentIdFinder.java:78)
   at org.netbeans.modules.web.wicket.tree.ComponentIdFinder.visitNewClass(ComponentIdFinder.java:34)
   at com.sun.tools.javac.tree.JCTree$JCNewClass.accept(JCTree.java:1371)
   at org.netbeans.modules.web.wicket.tree.JavaTreeBuilder$T.run(JavaTreeBuilder.java:177)
   at org.netbeans.modules.web.wicket.tree.JavaTreeBuilder$T.run(JavaTreeBuilder.java:86)
   at org.netbeans.api.java.source.JavaSource$MultiTask.run(JavaSource.java:478)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:154)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:138)
   at org.netbeans.modules.parsing.impl.TaskProcessor$1.call(TaskProcessor.java:200)
   at org.netbeans.modules.parsing.impl.TaskProcessor$1.call(TaskProcessor.java:197)
   at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:160)
   at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:227)
   at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:66)
   at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:197)
   at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:106)
   at org.netbeans.api.java.source.JavaSource.runUserActionTaskImpl(JavaSource.java:433)
   at org.netbeans.api.java.source.JavaSource.runUserActionTask(JavaSource.java:404)
   at org.netbeans.modules.web.wicket.tree.JavaTreeBuilder.analyze(JavaTreeBuilder.java:71)
   at org.netbeans.modules.web.wicket.verification.WicketProblemAnnotationProvider.annotate(WicketProblemAnnotationProvider.java:186)
   at org.netbeans.modules.web.wicket.verification.WicketProblemAnnotationProvider.annotate(WicketProblemAnnotationProvider.java:175)
   at org.netbeans.modules.web.wicket.verification.WicketProblemAnnotationProvider.annotate(WicketProblemAnnotationProvider.java:118)
   at org.netbeans.modules.web.wicket.verification.WicketProblemAnnotationProvider.annotate(WicketProblemAnnotationProvider.java:88)
   at org.openide.text.CloneableEditorSupport.ensureAnnotationsLoaded(CloneableEditorSupport.java:385)
   at org.openide.text.CloneableEditor$DoInitialize$3.run(CloneableEditor.java:775)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1418)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1957)