question: get the level of the node . concode_field_sep Node parent concode_elem_sep int level concode_elem_sep SortedSet<Node> children concode_elem_sep SortedSet<Node> EMPTY_SET concode_elem_sep String name concode_field_sep void checkChildren concode_elem_sep Set<Node> getChildren concode_elem_sep Node getParent concode_elem_sep String getName concode_elem_sep boolean hasChildren concode_elem_sep int hashCode concode_elem_sep boolean equals concode_elem_sep String toString concode_elem_sep int compareTo concode_elem_sep boolean addChild
target: int function ( ) { return level ; }