I have a scenario where in I want to filter the content assist proposals provide by Xtext. I have read post http://www.eclipse.org/forums/index.php/m/902814/ where they have told how we could in case of lookupCrossReference method. I wanted to know how to do if the method in AbstractDslProposalProvider internally calls completeRullCall method. What should be done in this case.
How could I filter the proposals in the above scenario?