jsf primefaces webdevelopment dataTable panelGrid

After certain period the project manager proposed the change of the fields of an object that should be visible in a Primefaces dataTable. The new introduced field was of the type java.util.List with any number of elements. The representation of the values was not solvable in the dataTable as it does not support nested cells. After unsuccessfully fixing of the problem, I needed to represent data in the panelGrid element.