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https://issues.apache.org/jira/browse/CAUSEWAY-4008?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Andi Huber resolved CAUSEWAY-4008.
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Resolution: Resolved
> [Wicket Viewer] NPE in ParentedCollectionPanel
> ----------------------------------------------
>
> Key: CAUSEWAY-4008
> URL: https://issues.apache.org/jira/browse/CAUSEWAY-4008
> Project: Causeway
> Issue Type: Bug
> Components: Viewer Wicket
> Reporter: Andi Huber
> Assignee: Andi Huber
> Priority: Major
> Fix For: 4.0.0
>
>
> Caused by: {*}java.lang.NullPointerException{*}: Cannot invoke
> "java.util.Optional.ifPresent(java.util.function.Consumer)" because
> "this.tableDecorator" is null
> at
> org.apache.causeway.viewer.wicket.ui.components.collection.parented.ParentedCollectionPanel#renderHead(ParentedCollectionPanel.java:121)
> at org.apache.wicket.Component#internalRenderHead(Component.java:2663)
> at
> org.apache.wicket.markup.renderStrategy.ChildFirstHeaderRenderStrategy$1#component(ChildFirstHeaderRenderStrategy.java:85)
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