PathNode function ( ) { if ( isBootstrap ( ) ) return null ; if ( ! isSnake ( ) && prev != null ) return prev . previousSnake ( ) ; return this ; }
skips sequences of diffnode diffnodes until a snake or bootstrap node is found , or the endof the path is reached . concode_field_sep PathNode prev concode_elem_sep int i concode_elem_sep int j concode_field_sep boolean isSnake concode_elem_sep boolean isBootstrap concode_elem_sep String toString