java.lang.IllegalArgumentException: Invalid identifier : >Iterable<? extends U><

java.lang.IllegalArgumentException: Invalid identifier : >Iterable<
at org.eclipse.jdt.core.dom.SimpleName.setIdentifier(SimpleName.java:247)
at org.eclipse.jdt.core.dom.AST.newSimpleName(AST.java:2777)
at org.eclipse.jdt.internal.ui.text.correction.QuickAssistProcessor.getAddMethodDeclaration(QuickAssistProcessor.java:1704)
at org.eclipse.jdt.internal.ui.text.correction.QuickAssistProcessor.getAssists(QuickAssistProcessor.java:363)
at org.eclipse.jdt.internal.ui.text.correction.JavaCorrectionProcessor$SafeAssistCollector.safeRun(JavaCorrectionProcessor.java:404)
at org.eclipse.jdt.internal.ui.text.correction.JavaCorrectionProcessor$SafeCorrectionProcessorAccess.run(JavaCorrectionProcessor.java:341)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
at org.eclipse.jdt.internal.ui.text.correction.JavaCorrectionProcessor$SafeCorrectionProcessorAccess.process(JavaCorrectionProcessor.java:330)
at org.eclipse.jdt.internal.ui.text.correction.JavaCorrectionProcessor.collectAssists(JavaCorrectionProcessor.java:506)
at org.eclipse.jdt.internal.ui.text.correction.JavaCorrectionProcessor.collectProposals(JavaCorrectionProcessor.java:291)
at org.eclipse.jdt.internal.ui.text.correction.JavaCorrectionProcessor.computeQuickAssistProposals(JavaCorrectionProcessor.java:247)
at org.eclipse.jface.text.quickassist.QuickAssistAssistant$ContentAssistProcessor.computeCompletionProposals(QuickAssistAssistant.java:71)
at org.eclipse.jface.text.contentassist.ContentAssistant$2.lambda$0(ContentAssistant.java:2048)
at java.base/java.util.Collections$SingletonSet.forEach(Collections.java:4905)
at org.eclipse.jface.text.contentassist.ContentAssistant$2.run(ContentAssistant.java:2047)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
at org.eclipse.jface.text.contentassist.ContentAssistant.computeCompletionProposals(ContentAssistant.java:2044)
at org.eclipse.jface.text.contentassist.CompletionProposalPopup.computeProposals(CompletionProposalPopup.java:577)
at org.eclipse.jface.text.contentassist.CompletionProposalPopup.lambda$0(CompletionProposalPopup.java:507)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:74)
at org.eclipse.jface.text.contentassist.CompletionProposalPopup.showProposals(CompletionProposalPopup.java:502)
at org.eclipse.jface.text.contentassist.ContentAssistant.showPossibleCompletions(ContentAssistant.java:1858)
at org.eclipse.jface.text.quickassist.QuickAssistAssistant.showPossibleQuickAssists(QuickAssistAssistant.java:113)
at org.eclipse.jdt.internal.ui.text.correction.JavaCorrectionAssistant.showPossibleQuickAssists(JavaCorrectionAssistant.java:194)
at org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor$AdaptedSourceViewer.doOperation(CompilationUnitEditor.java:201)
at org.eclipse.ui.texteditor.TextOperationAction.lambda$0(TextOperationAction.java:130)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:74)
at org.eclipse.ui.texteditor.TextOperationAction.run(TextOperationAction.java:130)
at org.eclipse.jface.action.Action.runWithEvent(Action.java:474)
at org.eclipse.jface.commands.ActionHandler.execute(ActionHandler.java:121)
at org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:97)
at jdk.internal.reflect.GeneratedMethodAccessor124.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:58)
at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:317)
at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:251)
at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:173)
at org.eclipse.e4.core.commands.internal.HandlerServiceHandler.execute(HandlerServiceHandler.java:156)
at org.eclipse.core.commands.Command.executeWithChecks(Command.java:488)
at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:485)
at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:213)
at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.executeCommand(KeyBindingDispatcher.java:308)
at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.press(KeyBindingDispatcher.java:580)
at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.processKeyEvent(KeyBindingDispatcher.java:647)
at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.filterKeySequenceBindings(KeyBindingDispatcher.java:439)
at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher$KeyDownFilter.handleEvent(KeyBindingDispatcher.java:96)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89)
at org.eclipse.swt.widgets.Display.filterEvent(Display.java:1908)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1528)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1555)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1538)
at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1577)
at org.eclipse.swt.widgets.Widget.gtk_key_press_event(Widget.java:937)
at org.eclipse.swt.widgets.Control.gtk_key_press_event(Control.java:4004)
at org.eclipse.swt.widgets.Composite.gtk_key_press_event(Composite.java:921)
at org.eclipse.swt.widgets.Widget.windowProc(Widget.java:2434)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:6832)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:6114)
at org.eclipse.swt.internal.gtk3.GTK3.gtk_main_do_event(Native Method)
at org.eclipse.swt.widgets.Display.eventProc(Display.java:1552)
at org.eclipse.swt.internal.gtk3.GTK3.gtk_main_iteration_do(Native Method)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:4474)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1155)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1046)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:155)
at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:644)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:551)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:156)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:152)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:136)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:402)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:659)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:596)
at org.eclipse.equinox.launcher.Main.run(Main.java:1467)
at org.eclipse.equinox.launcher.Main.main(Main.java:1440)