List < Vertex > function ( ) { return parents ; }
get the list the most direct ancestors parents . concode_field_sep List<Vertex> children concode_elem_sep List<Vertex> parents concode_elem_sep String label concode_field_sep String getLabel concode_elem_sep boolean isRoot concode_elem_sep boolean isConnected concode_elem_sep void removeEdgeTo concode_elem_sep boolean isLeaf concode_elem_sep void addEdgeFrom concode_elem_sep List<String> getParentLabels concode_elem_sep List<Vertex> getChildren concode_elem_sep List<String> getChildLabels concode_elem_sep Object clone concode_elem_sep String toString concode_elem_sep void addEdgeTo concode_elem_sep void removeEdgeFrom