is the tree empty ? concode_field_sep Node<MyType> root concode_field_sep void insertLeft concode_elem_sep Node<MyType> find concode_elem_sep Node<MyType> root concode_elem_sep Node<MyType> findParent concode_elem_sep void clear concode_elem_sep void insert concode_elem_sep void insert concode_elem_sep Node<MyType> delete concode_elem_sep void insertRight concode_elem_sep void displayTree
boolean function ( ) { return root == null ; }