3 (metacopy:defcopy-methods basic-vertex
6 (metacopy:defcopy-methods basic-edge
7 :set (edge-id tag color graph)
10 (metacopy:defcopy-methods weighted-edge-mixin
13 (metacopy:defcopy-methods basic-graph
16 (metacopy:defcopy-methods graph-container-vertex
19 (metacopy:defcopy-methods graph-container-edge
22 (defmethod generate-directed-free-tree ((graph basic-graph) (root basic-vertex))
23 (let ((new-graph (metacopy:copy-thing graph)))
25 (nilf (contains-undirected-edge-p new-graph))
26 (neighbors-to-children new-graph root)