public void removeContributor(ChooseByNameContributor contributor){
  myGotoClassContributors.remove(contributor);
  myGotoSymbolContributors.remove(contributor);
}

public void removeContributor ( ChooseByNameContributor contributor ) { myGotoClassContributors . remove ( contributor ) ; myGotoSymbolContributors . remove ( contributor ) ; }
unregisters a contributor for " goto class " and " goto symbol " lists .
