public @NlsContexts.Tooltip String getElementTooltip(PsiMember member) {
    final Set<? extends PsiMember> dependencies = getDependenciesOf(member);
    if(dependencies == null || dependencies.size() == 0) return null;
    String interfaces = StringUtil.join(dependencies, PsiMember::getName, ", ");
    return RefactoringBundle.message("interface.member.dependency.required.by.interfaces.list", dependencies.size(), interfaces);
  }
public @NlsContexts.Tooltip String getElementTooltip(PsiMember member)