Return the string names of the set of nodes branching from
            current node as list of strings

def lstr_lsnode(self, astr_path=""):
            """
            Return the string names of the set of nodes branching from
            current node as list of strings
            """
            self.sCore.reset()
            str_cwd       = self.cwd()
            if len(astr_path): self.cdnode(astr_path)
            lst = self.snode_current.d_nodes.keys()
            if len(astr_path): self.cdnode(str_cwd)
            return lst