get all children concepts . concode_field_sep Set<String> synset concode_elem_sep Concept parent concode_elem_sep List<Concept> children concode_elem_sep Taxonomy taxonomy concode_field_sep boolean isAncestorOf concode_elem_sep List<Concept> getPathToRoot concode_elem_sep void removeKeyword concode_elem_sep void addKeywords concode_elem_sep void addKeywords concode_elem_sep List<Concept> getPathFromRoot concode_elem_sep Set<String> getKeywords concode_elem_sep boolean removeChild concode_elem_sep void addKeyword concode_elem_sep String toString concode_elem_sep boolean isLeaf concode_elem_sep Concept addChild concode_elem_sep void addChild
List < Concept > function ( ) { return children ; }