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java.lang.NullPointerException: 	at org.springframework.ide.eclipse.beans.core.internal.model.BeansModelPropertyTester.test(BeansModelPropertyTester.java:43)	at org.eclipse.core.internal.expressions.Property.test(Property.java:58)	at org.eclipse.core.internal.expressions.TestExpression.evaluate(TestExpression.java:80)	at org.eclipse.core.internal.expressions.CompositeExpression.evaluateAnd(CompositeExpression.java:53)	at org.eclipse.core.internal.expressions.AndExpression.evaluate(AndExpression.java:29)	at org.eclipse.core.internal.expressions.CompositeExpression.evaluateOr(CompositeExpression.java:68)	at org.eclipse.core.internal.expressions.OrExpression.evaluate(OrExpression.java:21)	at org.eclipse.ui.internal.navigator.CustomAndExpression.evaluate(CustomAndExpression.java:70)	at org.eclipse.ui.internal.navigator.extensions.NavigatorContentDescriptor.isTriggerPoint(NavigatorContentDescriptor.java:336)	at org.eclipse.ui.internal.navigator.extensions.NavigatorContentDescriptorManager.findDescriptorsForTriggerPoint(NavigatorContentDescriptorManager.java:171)	at org.eclipse.ui.internal.navigator.NavigatorContentService.findDescriptorsByTriggerPoint(NavigatorContentService.java:705)	at org.eclipse.ui.internal.navigator.NavigatorContentService.findContentExtensionsByTriggerPoint(NavigatorContentService.java:584)	at org.eclipse.ui.internal.navigator.NavigatorContentService.findContentExtensionsByTriggerPoint(NavigatorContentService.java:566)	at org.eclipse.ui.internal.navigator.NavigatorContentServiceContentProvider.hasChildren(NavigatorContentServiceContentProvider.java:644)	at org.eclipse.jface.viewers.AbstractTreeViewer.isExpandable(AbstractTreeViewer.java:1887)	at org.eclipse.jface.viewers.AbstractTreeViewer.updatePlus(AbstractTreeViewer.java:2470)	at org.eclipse.jface.viewers.AbstractTreeViewer.updateChildren(AbstractTreeViewer.java:2417)	at org.eclipse.jface.viewers.AbstractTreeViewer.internalRefreshStruct(AbstractTreeViewer.java:1640)	at org.eclipse.jface.viewers.TreeViewer.internalRefreshStruct(TreeViewer.java:955)	at org.eclipse.jface.viewers.AbstractTreeViewer.internalRefresh(AbstractTreeViewer.java:1616)	at org.eclipse.jface.viewers.AbstractTreeViewer.internalRefresh(AbstractTreeViewer.java:1571)	at org.eclipse.ui.navigator.CommonViewer.internalRefresh(CommonViewer.java:410)