In the outline view of the GMF editor I am getting two tabs, one for the
diagram and the other for the tree view. But in the tree I am not able to
get the full tree(model as we get in the project explorer). Even I would
like to customize the tree viewer and would like to put some filters as
well on it. So what I am lookin for is some method to override the default
tree viewer of the outline view. Please suggest some solution.