code: def lstr_lsnode(self, astr_path=""):
              
              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
docs: Return the string names of the set of nodes branching from
              current node as list of strings