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https://issues.apache.org/jira/browse/OFBIZ-3774?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13150524#comment-13150524
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Adrian Crum commented on OFBIZ-3774:
------------------------------------

By the way, the existing patches are POC type work - they should not be used 
directly. Instead, use them as a guideline. One of the things I tried to do in 
those patches was maintain backward compatibility, but recent discussions on 
the dev mailing list have opened up the possibility to make newer versions of 
OFBiz less backwards compatible - if there is a significant improvement 
involved.

                
> Add The Visitor Pattern To Screen Widget Model Classes
> ------------------------------------------------------
>
>                 Key: OFBIZ-3774
>                 URL: https://issues.apache.org/jira/browse/OFBIZ-3774
>             Project: OFBiz
>          Issue Type: Improvement
>          Components: framework
>            Reporter: Adrian Crum
>            Priority: Minor
>         Attachments: OFBIZ-3774.patch, OFBIZ-3774.patch, OFBIZ-3774.patch
>
>
> From time to time there has been interest expressed in introducing the 
> visitor pattern to the screen widget model classes. This issue is intended to 
> provide a forum on the subject and a means to vote on it. Details are in the 
> comments.

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