Return a generator of the IDs of multiplicons found at leaves
            of the tree (i.e. from which no further multiplicons were derived).

            Arguments:

            o redundant - if true, report redundant multiplicons

def get_multiplicon_leaves(self, redundant=False):
        """ Return a generator of the IDs of multiplicons found at leaves
            of the tree (i.e. from which no further multiplicons were derived).

            Arguments:

            o redundant - if true, report redundant multiplicons
        """
        for node in self._multiplicon_graph.nodes():
            if not len(self._multiplicon_graph.out_edges(node)):
                if not self.is_redundant_multiplicon(node):
                    yield node
                elif redundant:
                    yield node
                else:
                    continue
            else:
                continue