question: public void ascendTree ( ) { if ( null != parentPath ) { parentPath . append ( PARENT_PATH ) ; return ; } File parentTree = calcParentTree ( ) ; if ( null != parentTree ) { treeFile = parentTree ; return ; } parentPath = new StringBuilder ( provideLastName ( ) ) ; parentPath . append ( PARENT_PATH ) ; }
target:  Move higher in the tree, beyond even an apparent root of tree.