lib/jumoku/builders/shared.rb in jumoku-0.2.0 vs lib/jumoku/builders/shared.rb in jumoku-0.2.1

@@ -1,17 +1,14 @@
 module Jumoku
   # This module provides the basic routines needed to implement the specialized
-  # builders: {UndirectedTreeBuilder} and {DirectedTreeBuilder}. Those
-  # implementations are under the control of the {TreeAPI}.
+  # builders: {UndirectedTreeBuilder} and {DirectedTreeBuilder}.
   #
   module Shared
     def self.included(base)
       base.class_eval do
         # Late aliasing as it references methods provided by Plexus modules.
         alias has_node? has_vertex?
-        alias has_branch? has_edge?
-        include TreeAPI
       end
     end
 
     # Adds the node to the tree.
     #
@@ -174,10 +171,10 @@
     # * acyclic
     # * connected
     #
     # @return [Boolean]
     def valid?
-      acyclic? and connected? and not directed?
+      acyclic? and connected?
     end
 
     # Is the node a terminal node?
     #
     # @return [Boolean]