Hey the code samples are not functional. What is log that is dp? Why you do

Directory TwinColSelect
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Hey the code samples are not functional. What is log that is dp? Why you do not make an example that works and uses just the component?

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You can see the full source code in the example app here

https://github.com/TatuLund/TwinColSelect/blob/master/src/test/java/org/vaadin/tatu/View.java