def node_mustNotInclude(self, al_mustNotInclude, ab_reset=False):
            """
            Either appends or resets the <mustNotInclude> list of snode_current
            depending on <ab_reset>.
            """
            if ab_reset:
                self.snode_current.l_mustNotInclude = al_mustNotInclude[:]
            else:
                l_current   = self.snode_current.l_mustNotInclude[:]
                l_total     = l_current + al_mustNotInclude
                self.snode_current.l_mustNotInclude = l_total[:]