returns the number of levels in the tree . concode_field_sep long serialVersionUID concode_elem_sep Root root concode_elem_sep double minExtent concode_field_sep Envelope ensureExtent concode_elem_sep int size concode_elem_sep void collectStats concode_elem_sep List query concode_elem_sep void query concode_elem_sep boolean isEmpty concode_elem_sep void insert concode_elem_sep List queryAll concode_elem_sep boolean remove
int function ( ) { if ( root != null ) return root . depth ( ) ; return 0 ; }